DE102007002961B4 - Storage device and method for its production - Google Patents
Storage device and method for its production Download PDFInfo
- Publication number
- DE102007002961B4 DE102007002961B4 DE102007002961A DE102007002961A DE102007002961B4 DE 102007002961 B4 DE102007002961 B4 DE 102007002961B4 DE 102007002961 A DE102007002961 A DE 102007002961A DE 102007002961 A DE102007002961 A DE 102007002961A DE 102007002961 B4 DE102007002961 B4 DE 102007002961B4
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Abstract
Speichervorrichtung (1), welche zumindest einen Speicherstapel (3) von gestapelten Speicherchips (4) aufweist, die in Bezug zueinander versetzt sind,
wobei jeder gestapelte Speicherchip (4) des Speicherstapels (3) längs seines Rands Chip-Pads (5) zum Bonden des gestapelten Speicherchips (4) an Substrat-Pads (6) der Speichervorrichtung (1) aufweist, die mit einer Steuerschaltung verbindbar sind,
wobei jedes Chip-Pad (5) eines gestapelten Speicherchips (4), welches den gestapelten Speicherchip (4) mit einem Substrat-Pad (6), das mit der Steuerschaltung verbindbar ist, individuell verbindet, einen vergrößerten Abstand (di) zu benachbarten Chip-Pads (5) im Vergleich zu Chip-Pads (5) des gestapelten Speicherchips (4) aufweist, welche den gestapelten Speicherchip (4) parallel mit korrespondierenden Chip-Pads (5) von anderen gestapelten Speicherchips (4) des Speicherstapels (3) mit korrespondierenden Substrat-Pads (6), die mit der Steuerschaltung verbindbar sind, verbinden, wobei mindestens ein gestapelter Speicherchip (4) beide Arten von Chip-Pads aufweist. A memory device (1) comprising at least one memory stack (3) of stacked memory chips (4) offset with respect to each other,
each stacked memory chip (4) of the memory stack (3) having along its edge chip pads (5) for bonding the stacked memory chip (4) to substrate pads (6) of the memory device (1) connectable to a control circuit;
wherein each chip pad (5) of a stacked memory chip (4), which individually connects the stacked memory chip (4) to a substrate pad (6) connectable to the control circuit, is adjacent to an increased distance (d i ) Chip pads (5) compared to chip pads (5) of the stacked memory chip (4), which the stacked memory chip (4) in parallel with corresponding chip pads (5) of other stacked memory chips (4) of the memory stack (3 ) with corresponding substrate pads (6) connectable to the control circuit, at least one stacked memory chip (4) having both types of chip pads.
Description
Die Erfindung betrifft eine Speichervorrichtung, welche zumindest einen Speicherstapel von gestapelten Speicherchips aufweist, die in Bezug zueinander versetzt sind, sowie ein Verfahren zu deren Herstellung. The The invention relates to a storage device which comprises at least one Memory stack of stacked memory chips, with respect to offset from each other, and a method for their preparation.
Insbesondere betrifft die Erfindung einen Flash-Speicher mit zumindest einem Flash-Speicherstapel von gestapelten Flash-Speicherchips, die in Bezug zueinander versetzt gestapelt sind.Especially The invention relates to a flash memory with at least one Flash memory stacks of stacked flash memory chips that are related to each other staggered are staggered.
Die
Die
Die
Die
Die Marktanforderung für kleinere, leichtere und leistungsfähigere Mobiltelefone, PDAs und weitere elektronische Vorrichtungen treibt die Entwicklung von kompakteren elektronischen Baugruppen in einem Gehäuse bzw. Gehäusen mit erhöhter Funktionalität an. Zur Erhöhung von Funktionalität und Kapazität elektronischer Vorrichtungen werden Speicherchips übereinander gestapelt. Jeder Stapel weist zwei, drei und vier mit Draht gebondete Chips auf, welche in typischer Weise in einer Pyramide oder in einem Stapel gleichgroßer Chips in überhängender Bauweise angeordnet sind. In dieser herkömmlichen Lösung sind Chips entweder mit einem Abstandshalter oder mit einem Zwischenlayer dazwischen übereinander gestapelt. Derzeit sind Chips mit einer Dicke von ungefähr 100 μm in Produktion. Bei herkömmlichen Speicherchipstapeln ist die Anzahl von Chips, welche übereinander gestapelt sind, auf Grund der Einschränkungen der zulässigen Baugruppenhöhe begrenzt. Wenn Chips übereinander gestapelt werden, wird das Bonden der Chip-Pads, die auf jedem Chip angeordnet sind, mit korrespondierenden Pads auf einem Substrat der Speichervorrichtung schwierig, und das Drahtbonden verbraucht mehr Raum bei erhöhter Anzahl von übereinander gestapelten Chips. Der Platzverbrauch für Drahtbonden erhöht sich insbesondere, wenn ein Pad oder ein Chip an unterschiedliche Pads auf dem Substrat gebondet wird. Außerdem erhöht sich bei zunehmender Anzahl von Drahtbonds ein Risiko von visuellen und elektrischen Kurzschlüssen.The Market requirement for smaller, lighter and more powerful mobile phones, PDAs and other electronic devices is driving the development of more compact electronic assemblies in a housing or housings with elevated functionality at. To increase of functionality and capacity electronic devices become memory chips on top of each other stacked. Each stack has two, three and four wire-bonded ones Chips, which are typically in a pyramid or in one Stack of equal size Overhanging chips are arranged. In this conventional solution are Chips either with a spacer or with an intermediate layer between them stacked. Currently, chips with a thickness of approximately 100 μm are in production. In conventional Memory chip stacks is the number of chips that are stacked on top of each other stacked, limited due to the limitations of the allowable assembly height. If chips are on top of each other Stacking will be the bonding of the chip pads on each chip are arranged, with corresponding pads on a substrate the storage device difficult, and consumes the wire bonding more space at elevated Number of superimposed stacked chips. The space consumption for wire bonding increases especially if a pad or a chip to different pads is bonded to the substrate. It also increases as the number of Wire bonds a risk of visual and electrical short circuits.
Die
Erfindung stellt eine Speichervorrichtung bereit, welche zumindest
einen Speicherstapel von gestapelten Speicherchips aufweist, die
in Bezug zueinander versetzt sind,
wobei jeder gestapelte Speicherchip
des Speicherstapels längs
seines Rands Chip-Pads zum Bonden des gestapelten Speicherchips
an Substrat-Pads der Speichervorrichtung aufweist, die mit einem
Steuerkreis bzw. einer Steuerschaltung verbindbar sind,
wobei
jedes Chip-Pad eines gestapelten Speicherchips, welches den gestapelten
Speicherchip mit einem Substrat-Pad, das mit der Steuerschaltung
verbindbar ist, individuell verbindet, einen vergrößerten Abstand
zu benachbarten Chip-Pads im Vergleich zu Chip-Pads des gestapelten
Speicherchips aufweist, welche den gestapelten Speicherchip parallel
mit korrespondierenden Chip-Pads von anderen gestapelten Speicherchips
des Speicherstapels mit korrespondierenden Substrat-Pads, die mit
der Steuerschaltung verbindbar sind, verbinden, wobei mindestens
ein gestapelter Speicherchip beide Arten von Chip-Pads aufweist.The invention provides a memory device having at least one memory stack of stacked memory chips offset with respect to each other,
wherein each stacked memory chip of the memory stack has along its edge chip pads for bonding the stacked memory chip to substrate pads of the memory device connectable to a control circuit and a control circuit, respectively;
wherein each chip pad of a stacked memory chip individually connecting the stacked memory chip to a substrate pad connectable to the control circuit has an increased distance to adjacent chip pads compared to chip pads of the stacked memory chip comprising the stacked memory chip stacked memory chip in parallel with corresponding chip pads of other stacked memory chips of the memory stack with corresponding substrate pads connectable to the control circuit connect, at least one stacked memory chip having both types of chip pads.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung ist ein Abstandsmuster der Chip-Pads längs des Rands eines gestapelten Speicherchips für alle gestapelten Speicherchips des gleichen Speicherstapels identisch.In an execution the memory device according to the present The invention is a spacing pattern of the chip pads along the edge of a stacked one Memory chips for all stacked memory chips of the same memory stack identical.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung sind die auf einem Substrat der Speichervorrichtung vorgesehenen Substrat-Pads in zumindest einer Reihe von Substrat-Pads angeordnet, welche im Wesentlichen parallel zu einem Rand des untersten gestapelten Speicherchips des Speicherstapels ausgerichtet sind, oder die Substrat-Pads sind in einer gekrümmten Linie zur Erhöhung der jeweiligen Zwischenräume angeordnet.In an execution the memory device according to the present Invention are provided on a substrate of the storage device substrate pads arranged in at least one row of substrate pads, which in the Essentially parallel to an edge of the lowest stacked memory chip of the memory stack, or are the substrate pads in a curved Line to increase the respective spaces arranged.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung weist jeder gestapelte Speicherchip einen Pad-Randbereich auf, in welchem die Chip-Pads des Speicherchips angeordnet sind.In an execution the memory device according to the present In the invention, each stacked memory chip has a pad edge region on, in which the chip pads of the memory chip are arranged.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung sind die Speicherchips in einer asymmetrischen versetzten Treppenanordnung übereinander gestapelt.In an execution the memory device according to the present Invention, the memory chips in an asymmetric offset Staircase arrangement on top of each other stacked.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung ist der vergrößerte Abstand gegeben durch: wobei N die Anzahl übereinander gestapelter Speicherchips in einer asymmetrischen versetzten Treppenanordnung ist, und ds ein minimaler Padabstand solcher auf dem Substrat der Speichervorrichtung vorgesehener Pads ist.In an embodiment of the memory device according to the present invention, the increased distance is given by: where N is the number of stacked memory chips in an asymmetric staggered arrangement of stairs, and d s is a minimum of such pad spacing on the substrate of the memory device provided pads.
In
einer Ausführung
der Speichervorrichtung gemäß der vorliegenden
Erfindung ist der minimale Padabstand ds solcher
auf dem Substrat der Speichervorrichtung vorgesehener Pads gegeben
durch: wobei hs ein
Abstand zwischen zwei korrespondierenden Chip-Pads von zwei versetzten
Speicherchips des Speicherstapels ist,
h0 der
Abstand zwischen Chip-Pads des untersten Speicherchips des Speicherstapels
und Substrat-Pads ist, die auf einem Substrat der Speichervorrichtung
vorgesehen sind, und
αmin ein minimaler Winkel ist, welcher verhindert,
dass ein Bonddraht ein anderes Chip-Pad kreuzt.In one embodiment of the memory device according to the present invention, the minimum pad spacing d s of such pads provided on the substrate of the memory device is given by: where h s is a distance between two corresponding chip pads of two staggered memory chips of the memory stack,
h 0 is the distance between chip pads of the lowermost memory chip of the memory stack and substrate pads provided on a substrate of the memory device, and
α min is a minimum angle which prevents a bond wire from crossing another chip pad.
In
einer Ausführung
der Speichervorrichtung gemäß der vorliegenden
Erfindung ist der minimale Winkel αmin gegeben
durch: wobei wp die
Breite eines Chip-Pads ist,
hp die
Länge eines
Chip-Pads ist, und
hs der Abstand zwischen
zwei korrespondierenden Chip-Pads von zwei versetzten Speicherchips
des Speicherstapels ist.In one embodiment of the memory device according to the present invention, the minimum angle α min is given by: where w p is the width of a chip pad,
h p is the length of a chip pad, and
h s is the distance between two corresponding chip pads of two staggered memory chips of the memory stack.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung sind die Speicherchips in einer symmetrischen versetzten wechselnden Anordnung übereinander gestapelt.In an execution the memory device according to the present Invention, the memory chips are in a symmetrical offset changing arrangement on top of each other stacked.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung sind die gestapelten Speicherchips so abwechselnd zueinander gestapelt, dass die Pad-Randbereiche von zwei Speicherchips, welche direkt übereinander gestapelt sind, in gegenüber liegenden Richtungen ausgerichtet sind.In an execution the memory device according to the present Invention, the stacked memory chips are so alternately to each other stacked that pad edge areas of two memory chips, which directly above each other are stacked in opposite are aligned lying directions.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung sind die Speicherchips zur Bildung einer Pyramide von gestapelten Speicherchips übereinander gestapelt.In an execution the memory device according to the present Invention are the memory chips to form a pyramid of stacked memory chips on top of each other stacked.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung sind die gestapelten Speicherchips direkt aufeinander angebracht.In an execution the memory device according to the present Invention, the stacked memory chips directly to each other appropriate.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung sind die gestapelten Speicherchips des Speicherstapels aneinander verklebt.In an execution the memory device according to the present Invention are the stacked memory chips of the memory stack glued together.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung ist ein Abstandshalter bzw. eine Zwischenlage zwischen zwei gestapelten Speicherchips des Speicherstapels vorgesehen.In an execution the memory device according to the present Invention is a spacer or an intermediate layer between provided two stacked memory chips of the memory stack.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung ist der zumindest eine Speicherstapel in einer Baugruppe bzw. einem Gehäuse der Speichervorrichtung geformt.In an execution the memory device according to the present Invention is the at least one memory stack in an assembly or a housing the storage device shaped.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung sind die gestapelten Speicherchips als gestapelte Flash-Speicher ausgebildet.In an execution the memory device according to the present Invention, the stacked memory chips are formed as stacked flash memory.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung ist ein Chip-Pad des gestapelten Speicherchips, welches die Speichervorrichtung individuell mit der Steuerschaltung verbindet, zur Aufbringung eines Chipfreigabesignals auf den gestapelten Speicherchip vorgesehen.In an execution the memory device according to the present Invention is a chip pad of the stacked memory chip, which individually connecting the memory device to the control circuit, for applying a chip enable signal to the stacked memory chip intended.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung ist das Chip-Pad des gestapelten Speicherchips, welches die Speichervorrichtung individuell mit der Steuerschaltung verbindet, für ein Lese-/In-Betrieb-Signal vorgesehen.In an execution the memory device according to the present Invention is the chip pad of the stacked memory chip, which individually connecting the memory device to the control circuit, for a Read / in operation signal provided.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung ist eine Anzahl von gestapelten Speicherchips des Speicherstapels mindestens vier.In an execution the memory device according to the present Invention is a number of stacked memory chips of the memory stack at least four.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung ist eine Anzahl von gestapelten Speicherchips des Speicherstapels mindestens acht.In an execution the memory device according to the present Invention is a number of stacked memory chips of the memory stack at least eight.
In einer Ausführung des Flash-Speichers gemäß der vorliegenden Erfindung sind die Flash-Speicherchips in einer asymmetrischen versetzten Treppenanordnung übereinander gestapelt.In an execution the flash memory according to the present invention Invention are the flash memory chips in an asymmetric offset Staircase arrangement on top of each other stacked.
In einer Ausführung des Flash-Speichers gemäß der vorliegenden Erfindung sind die Flash-Speicherchips in einer symmetrischen versetzten wechselnden Anordnung übereinander gestapelt.In an execution the flash memory according to the present invention Invention are the flash memory chips in a symmetrical offset changing arrangement on top of each other stacked.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung weist jeder gestapelte Speicherchip Chip-Pads auf, welche auf einer oberen Seite des gestapelten Speicherchips in einem Pad-Randbereich längs eines Rands des gestapelten Speicherchips angeordnet sind.In an execution the memory device according to the present Invention, each stacked memory chip on chip pads, which on an upper side of the stacked memory chip in a pad edge area along a Rands of the stacked memory chip are arranged.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung sind die gestapelten Speicherchips so in Bezug zueinander versetzt, dass die Pad-Randbereiche von allen gestapelten Speicherchips wechselnde Vorsprünge des symmetrischen Speicherstapels bilden.In an execution the memory device according to the present Invention, the stacked memory chips are so in relation to each other offset the pad margins from all stacked memory chips changing projections form the symmetric memory stack.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung sind der oberste gestapelte Speicherchip und der direkt unter dem obersten gestapelten Speicherchip befindliche Speicherchip so aufeinander gestapelt, dass die Pad-Randbereiche von beiden gestapelten Speicherchips in der gleichen Richtung ausgerichtet sind.In an execution the memory device according to the present Invention are the top stacked memory chip and the direct memory chip located under the top stacked memory chip stacked on top of each other so that the pad margins of both stacked Memory chips are aligned in the same direction.
In einer Ausführung der Speichervorrichtung gemäß der vorliegenden Erfindung sind die Chip-Pads des obersten gestapelten Speicherchips an die korrespondierenden Chip-Pads des direkt unter dem obersten gestapelten Speicherchips befindlichen Speicherchips gebondet.In an execution the memory device according to the present Invention are the chip pads of the top stacked memory chip on the corresponding chip pads of the directly stacked under the top Memory chips located memory chips bonded.
Die Erfindung stellt weiterhin eine Flash-Speichervorrichtung bereit, welche zumindest einen Speicherstapel von gestapelten Flash-Speicherchips aufweist, die direkt aufeinander gestapelt sind, und die in Bezug zueinander in einer symmetrischen wechselnden Anordnung versetzt sind.The Invention further provides a flash memory device which at least one memory stack of stacked flash memory chips which are stacked directly on top of each other and in relation to each other offset from each other in a symmetrical alternating arrangement are.
Die Erfindung stellt weiterhin ein Verfahren zum Herstellen einer Speichervorrichtung nach Anspruch 1 bereit, welches die folgenden Verfahrensschritte aufweist:
- (a) Bereitstellen eines Speicherchips mit Chip-Pads, welche auf einer oberen Seite des Speicherchips in einem Pad-Randbereich längs eines Rands des Speicherchips angeordnet sind;
- (b) Drehen eines weiteren Speicherchips in Bezug auf den vorhergehenden Speicherchip dergestalt, dass der Pad-Randbereich von beiden Speicherchips in gegenüber liegenden Richtungen ausgerichtet werden, und Anbringen des weiteren Speicherchips auf der oberen Seite des vorhergehenden Speicherchips in einer versetzten Weise dergestalt, dass der Pad-Randbereich des darunter liegenden vorhergehenden Speicherchips unbedeckt bleibt;
- (c) Wiederholen der Verfahrensschritte (a) und (b), bis eine vorher festgelegte Anzahl von Speicherchips übereinander gestapelt ist; und
- (d) Fertigstellen der Speichervorrichtung.
- (A) providing a memory chip with chip pads, which are arranged on an upper side of the memory chip in a pad edge region along an edge of the memory chip;
- (b) rotating another memory chip with respect to the previous memory chip such that the pad edge region of both memory chips are aligned in opposite directions, and attaching the further memory chip on the upper side of the preceding memory chip in a staggered manner such that the Pad edge region of the underlying previous memory chip remains uncovered;
- (c) repeating steps (a) and (b) until a predetermined number of memory chips are stacked on top of each other; and
- (d) Completing the storage device.
In einer Ausführung des Verfahrens gemäß der vorliegenden Erfindung werden die Pads der beiden obersten gestapelten Speicherchips des Speicherstapels, deren Pad-Randbereiche beide unbedeckt sind, gleichzeitig in einem Drahtbonding-Verfahrensschritt an Pads eines Substrats gebondet.In an execution the method according to the present invention Invention, the pads of the two top stacked memory chips the storage stack whose pad margins are both uncovered, simultaneously in a wire bonding process step on pads of a substrate bonded.
In einer Ausführung des Verfahrens gemäß der vorliegenden Erfindung wird der weitere Speicherchip um 180° in Bezug auf den vorhergehenden Speicherchip gedreht.In an execution the method according to the present invention Invention, the further memory chip by 180 ° with respect to the previous memory chip turned.
In einer Ausführung des Verfahrens gemäß der vorliegenden Erfindung wird der weitere Speicherchip um 90° in Bezug auf den vorhergehenden Speicherchip gedreht.In an execution the method according to the present invention Invention, the further memory chip by 90 ° with respect to the previous memory chip turned.
In einer Ausführung des Verfahrens gemäß der vorliegenden Erfindung werden die Speicherchips aus Flash-Speicherchips gebildet.In an execution the method according to the present invention Invention, the memory chips are formed from flash memory chips.
In einer Ausführung des Verfahrens gemäß der vorliegenden Erfindung werden zumindest vier Speicherchips übereinander gestapelt.In an execution the method according to the present invention Invention, at least four memory chips are stacked on top of each other.
In einer Ausführung des Verfahrens gemäß der vorliegenden Erfindung werden zumindest acht Speicherchips übereinander gestapelt.In an execution the method according to the present invention Invention, at least eight memory chips are stacked on top of each other.
In einer Ausführung des Verfahrens gemäß der vorliegenden Erfindung werden die Speicherchips aneinander geklebt.In an execution the method according to the present invention Invention, the memory chips are glued together.
In einer Ausführung des Verfahrens gemäß der vorliegenden Erfindung werden die gestapelten Speicherchips in einer Baugruppe bzw. in einem Gehäuse geformt.In an execution the method according to the present invention Invention, the stacked memory chips in an assembly or in a housing shaped.
Jeder
Chip-Pad
In
der Ausführung,
wie in
In
der in
In
der in
In
einer Ausführung
der Speichervorrichtung
In
einer noch weiteren Ausführung,
wie in
In
den in
In
anderen Ausführungen
ist es möglich,
einen minimalen möglichen
Padabstand dd auf dem Speicherchip
In
den in
In
anderen Ausführungen
weist die Speichervorrichtung
In
weiteren Ausführungen
ist es möglich, mehrere
Baugruppen von Speicherstapeln
Während einer
Herstellung der Speicherstapel
Wie
aus den in
Der
vergrößerte Abstand
di ist gegeben durch: wobei N die Anzahl von gestapelten
Speicherchips
Wie
aus
h0 ein Abstand zwischen Chip-Pads
αmin ein
minimaler Winkel ist, welcher vermeidet, dass ein Bonddraht
h 0 is a distance between chip pads
α min is a minimum angle, which avoids a bonding wire
Der
wie in
Die
Drahtbonds
In
der Ausführung,
die in
Bei
dem Drahtbondingschema, wie in
In
einer möglichen
Ausführung,
wie in
Die
Speicherschaltungsplatte
Wie
aus
Der
nächste
Speicherchip
Wie
in
In
der in
Die
Formdicke bzw. -stärke
kann wie folgt berechnet werden:
In
der in
In
dem gegebenen Beispiel ist die Abmessung der Chiplänge DL gegeben
durch:
Die Packungsbreite PW ist von der Chipbreite DW abhängig.The Pack width PW depends on the chip width DW.
In
der in
Für eine Packungsbreite PW von zum Beispiel 12 mm beträgt die Chipbreite DW 9,5 mm.For a package width PW of, for example, 12 mm the chip width DW 9.5 mm.
Folglich
ist der Bereich eines Speicherchips
Die maximale Chipabmessung, welche in eine Packung bzw. ein Gehäuse TLBGA 12 17 1,0 integriert werden kann, beträgt daher 155 mm2.The maximum chip size, which can be integrated into a package or housing TLBGA 12 17 1.0, is therefore 155 mm 2 .
In
der Ausführung,
die Speichervorrichtung
Die
Speicherchips
Mit
der Speichervorrichtung
Claims (37)
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Citations (4)
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---|---|---|---|---|
US5818114A (en) * | 1995-05-26 | 1998-10-06 | Hewlett-Packard Company | Radially staggered bond pad arrangements for integrated circuit pad circuitry |
US5951304A (en) * | 1997-05-21 | 1999-09-14 | General Electric Company | Fanout interconnection pad arrays |
US6376904B1 (en) * | 1999-12-23 | 2002-04-23 | Rambus Inc. | Redistributed bond pads in stacked integrated circuit die package |
US6900528B2 (en) * | 2001-06-21 | 2005-05-31 | Micron Technology, Inc. | Stacked mass storage flash memory package |
-
2007
- 2007-01-19 DE DE102007002961A patent/DE102007002961B4/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US5818114A (en) * | 1995-05-26 | 1998-10-06 | Hewlett-Packard Company | Radially staggered bond pad arrangements for integrated circuit pad circuitry |
US5951304A (en) * | 1997-05-21 | 1999-09-14 | General Electric Company | Fanout interconnection pad arrays |
US6376904B1 (en) * | 1999-12-23 | 2002-04-23 | Rambus Inc. | Redistributed bond pads in stacked integrated circuit die package |
US6900528B2 (en) * | 2001-06-21 | 2005-05-31 | Micron Technology, Inc. | Stacked mass storage flash memory package |
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