International Business Machines Corporation

Linda C Matthew

Martin J Goldberg

Stephen L Tisdale

Alfred Viehbeck

Kurt R Grebe

Harry R Bickford

Voya Rista Markovich

Michael J Palmer

Elizabeth F Foster

Paul William Coteus

Terrence Robert O'Toole

Alphonso Philip Lanzetta

Donald G McBride

Peter J Duke

John J Liutkus

Stephen L Buchwalter

Ho-Ming Tong

Claudius Feger

Teresita Ordonez Graham

Caroline A Kovac

Charles H Wilson

Helen L Yeh

Nelson R Tanner

Sampath Purushothaman

Lawrence Shungwei Mok

David Lee Rath

Thomas Mario Cipolla

Raymond R Horton

Ismail C Noyan

Walter P Pawlowski

John J Glenning

William D Brewer

Glen Walden Johnson

Peter G Ledermann

Michael R Scheuermann

Mark J Schadt

Christina M Knoedler

William A Donson

Brian C Derdall

Irene A Sterian

Aldred Viehbeck

Ioannis Damianakis

A flex or TAB product suitable for chip carrier applications wherein the flex reliability problems caused by copper dendrite growth and lead bending during power and thermal cycling are reduced by application of special coatings to lead areas of the flex tape.

Coated means for connecting a chip and a card

A structure including a halogenated polymeric-containing layer. At least a portion of a surface of the halogenated polymeric-containing layer is electrochemically reduced. An electrically conductive pattern is provided over at least a portion of the electrochemically reduced portion of the halogenated polymeric-containing layer.

Structure including a partially electrochemically reduced halogenated

A halogenated polymeric material is exposed to a reducing agent and/or an electrolyte and applied voltage to render exposed portions capable of being metallized and of being etched. The exposed portions can also be doped to thereby induce electrical conductivity therein. Also, new structures containing a free standing halogenated polymeric-containing layer and electrical conductive pattern thereon are provided.

Method for conditioning halogenated polymeric materials and structures

A method of treating a halogenated polymeric-containing substrate including exposing at least portions of the halogenated polymeric-containing substrate to a composition containing a reducing agent and an aprotic solvent selected from the group consisting of nitriles, nitro compounds, amides, esters, carbonates, oxides, sulfo compounds and mixtures thereof. The solvent is free of ethers, amines, ammonia. The composition is prepared by reacting a metal with an organic compound selected from the group consisting of polyaryl compounds, aromatic carbonyl containing compounds, aromatic nitriles, and aromatic heterocyclic nitrogen containing compounds in a reaction solvent that does not react with the metal but permits reaction between the metal and the organic compound to thereby provide the reducing agent. The reducing agent is isolated from the reaction solvent to obtain a reaction product as a solid. The reaction product is added to the aprotic solvent. The treated substrate is contacted with a material to promote adhesion of the material to the treated surface.

Method of applying flex tape protective coating onto a flex product

A process of providing an external wiring and connecting package for a semiconductor chip wherein the chip is a major contributor to the strength of the package. External contacts and wiring are provided by a multilayer wiring member that may include a mesh ground plane with embedded power bus layer over a conductor layer for expansion mismatch control and impedance control, a protective encapsulation covers the bonds from the wiring conductors to the chip, and external contact connections employ fused metal through the contact members.

Process of multilayer conductor chip packaging

Certain organic polymeric materials are capable of reversibly accepting or donating electrons from a reducing entity. The redox sites in the polymer accept electrons and, as a result, a change in the properties of the polymer occurs. This change is useful in modifying or etching the polymeric material. The material can be modified by incorporation of metallic seeds into the material at a controlled depth. The seeds are incorporated by interaction of cations of the metals with the redox sites in the polymer, which cause the reduction of the cations to form the neutral metallic seeds. Subsequent exposure of the polymeric material containing the seeds to an electroless bath causes further deposition of metal having the desirable characteristic of good adhesion to the polymeric material. Etching of the polymeric material can be carried out as a result of an increase in solubility of the polymer in aprotic solvents when its redox sites have accepted electrons. The increased solubility allows openings to be etched in certain areas of the polymeric material that have been reduced, leaving other areas unchanged.

Method for bonding two surfaces together

A semiconductor chip package wherein the chip is a major contributor to the strength of the package. External contacts and wiring are provided by a multilayer wiring member that has a mesh ground plane with embedded power bus layer over a conductor layer for expansion mismatch control and impedance control, a protective encapsulation covers the bonds from the wiring conductors to the chip, and external contact connections employ fused metal through the contact members.

Semiconductor chip packaging structure including a ground plane

The present invention relates to an improved flex (or TAB) product suitable for silicon carrier or other types of chip carrier applications, wherein the flex reliability problems caused for example by Cu thermal cycling are substantially reduced or eliminated. More particularly, the invention embodies a number of coatings for use in such products and diverse methods of making and using same.

Flex tape protective coating

This invention relates to three dimensional packaging of integrated circuit chips into stacks to form cuboid structures. Between adjacent chips in the stack, there is disposed an electrical interconnection means which is a first substrate having a plurality of conductors one end of which is electrically connected to chip contact locations and the other end of which extends to one side of the chip stack to form a plurality of pin-like electrical interconnection assemblies. The pin-like structures can be formed from projections of the first substrate having an electrical conductor on at least one side thereof extending from this side. Alternatively, the pin-like structures can be formed from conductors which cantilever from both sides of an edge of the first substrate and within which corresponding conductors from both sides are aligned and spaced apart by the first substrate thickness. The spaces contain solder and form solder loaded pin-like structures. The pin-like structures can be directly solder bonded to conductors on a second substrate surface or the pin-like structures can be adapted for insertion into apertures in a second substrate. The second substrate provides a means for electrically inter-connecting a plurality of these cuboids. Preferably, the first and second substrates are circuitized flexible polymeric films. The second substrate is disposed on a third substrate, such as a PC board, with a resilient material therebetween which permits a heat sink to be pressed into intimate contact with an opposite side of the cuboid structures.

Packages for stacked integrated circuit chip cubes

A high density circuit package includes a pair of planar packages, the planar packages exhibiting front and back surfaces and positioned back-to-back in the high density circuit package. Each planar package includes a flexible circuit carrier having a plurality of circuit chips mounted thereon. Front and back planar metallic heat sinks sandwich the circuit carriers, at least one of the heat sinks contacting a surface of the chips mounted on the sandwiched circuit carriers. Each heat sink is provided with air flow apertures formed in its planar surface and adjacent to each circuit chip. A circuit card interconnects with the circuit carriers in an interconnection region and is pluggable into a female connector. The planar metallic heat sinks and circuit carriers are mechanically packaged so as to provide a planar arrangement which aligns the apertures in both the front and rear heat sinks. A pair of planar packages are mechanically connected in a back-to-back arrangement so that the apertures therebetween are aligned. The associated circuit cards are also back-to-back oriented so as to enable their joint interconnection into the female connector.

High density, high performance memory circuit package

Certain organic polymeric materials are capable of reversibly accepting or donating electrons from a reducing entity. The redox sites in the polymer accept electrons and, as a result, a change in the properties of the polymer occurs. This change is useful in modifying or etching the polymeric material The material can be modified by incorporation of metallic seeds into the material at a controlled depth. The seeds are incorporated by interaction of cations of the metals with the redox sites in the polymer, which cause the reduction of the cations to form the neutral metallic seeds. Subsequent exposure of the polymeric material containing the seeds to an electroless bath causes further deposition of metal having the desirable characteristic of good adhesion to the polymeric material. Etching of the polymeric material can be carried out as a result of an increase in solubility of the polymer in aprotic solvents when its redox sites have accepted electrons. The increased solubility allows openings to be etched in certain areas of the polymeric material that have been reduced, leaving other areas unchanged.

Method for conditioning an organic polymeric material

Method for etching an organic polymeric material

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Peekskill, NY, United States of America

Linda C Matthew