Etching a substrate: processes – Gas phase etching of substrate – Application of energy to the gaseous etchant or to the...
Reexamination Certificate
1999-08-18
2002-05-21
Gulakowski, Randy (Department: 1746)
Etching a substrate: processes
Gas phase etching of substrate
Application of energy to the gaseous etchant or to the...
C438S694000, C438S706000, C438S957000, C438S968000, C438S976000, C029S846000, C029S849000, C156S247000, C156S248000, C156S273900
Reexamination Certificate
active
06391220
ABSTRACT:
FIELD OF THE INVENTION
Embodiments of the invention relate to methods and precursors used for forming flexible circuit structures.
BACKGROUND OF THE INVENTION
Circuit structures such as circuit boards have conductive lines which are used to communicate electrical components such as integrated circuit chips. Flexible circuit structures have been of particular interest in recent years, because flexible circuit structures have many advantages over rigid circuit structures. For example, flexible circuit structures typically weigh less and can occupy less space than rigid circuit structures. The reduced space and weight provided by flexible circuit structures make them especially suitable for use in lightweight and small products such as laptop computers, cellular phones, cameras, etc.
While flexible circuit structures are highly desirable, reliable flexible circuit structures having fine line circuit patterns can be difficult to form in an efficient and cost-effective manner. For example, typical flexible circuit structure precursors typically include one or more flexible dielectric films with one or more conductive patterns on the dielectric films. Forming conductive patterns on flexible dielectric films is difficult, because they are flimsy and thin. If, for example, a flexible dielectric film wrinkles during a photolithography process, a formed photoresist image on the dielectric film may be distorted. This distortion can lead to the formation of short and/or open circuits in the subsequently formed conductive pattern.
It would be desirable to provide for improved articles and methods for fabricating flexible circuit structures.
SUMMARY OF THE INVENTION
Embodiments of the invention can be used to manufacture flexible circuit structures efficiently and less expensively.
One embodiment of the invention is directed to a method comprising: depositing a release layer on a substrate; forming a conductive laminate on the release layer; and peeling at least a portion of the conductive laminate off of the substrate.
Another embodiment of the invention is directed to a method comprising: depositing a release layer on a substrate; forming a flexible conductive laminate on the release layer; cutting the conductive laminate along a line defining a portion of the conductive laminate; and separating the cut portion of the conductive laminate from the substrate.
Another embodiment of the invention is directed to an article comprising: a substrate; a conductive laminate; and a release layer disposed between the substrate and the conductive laminate, wherein the conductive laminate is flexible and is capable of being peeled off of the substrate.
These and other embodiments of the invention are described in further detail below.
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Fach et al., “High-flexible Multilayer Substrates with 30 &mgr;m Vias for Highest Connection and Packaging Density,” FLEXCON™ '97, 1997 Semiconductor Technology Center, Inc., pps. 111-116.
Beilin Solomon
Roman James J.
Swamy Som S.
Zhang Lei
Coudert Brothers LLP
Fujitsu Limited, Inc.
Gulakowski Randy
Smetana Jiri
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