US 4,792,517 AGranted

Luminate for the formation of beam leads for IC chip bonding

AssigneeEastman Kodak Company

InventorsGerald W. Klein, Robert C. McConkey, Michel F. Molaire, John M. Noonan

Life of this patent

Estimating the term…

Loading patent…

Abstract

A laminate, adapted for manufacturing frames of metal beam leads that are bonded to integrated circuit chips, comprises (a) a flexible metal strip, (b) a layer of a first resist adhered to one surface of the metal strip, and (c) a layer of a second resist adhered to the opposite surface of the metal strip, the second resist being a negative-working resist comprising (1) a polymeric binder, (2) a photopolymerizable monomer mixture, and (3) a photoinitiator composition. The negative-working resist exhibits excellent flexibility and adhesion to the metal and superior performance during high temperature processing, whereby it serves effectively as a support for the beam leads.

Claims5

Dependent claims

A laminate, adapted for manufacturing frames of metal beam leads that are bonded to integrated circuit chips, said laminate comprising

(a) a flexible metal strip,
(b) a layer of a first resist adhered to one surface of said metal strip, and
(c) a layer of a second resist adhered to the opposite surface of said metal strip, wherein said second resist is a negative-working resist which comprises
(1) a polymeric binder having a glass transition temperature of at least 150.degree. C.,
(2) a photopolymerizable monomer mixture comprising a monomer having the structural formula ##STR9## a monomer having the structural formula ##STR10## wherein q is 2, 3 or 4, b is 1 or 2, m and p are integers of from 1 to 10, and R and R.sup.1 are individually H or CH.sub.3, and
(3) a photoinitiator composition.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/077,714Filed 24 Jul 1987
Granted: 20 Dec 1988
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

C09K 19/06
Characterised by the chemical structure of the liquid crystal components , e.g. by a specific unit: non-steroidal liquid crystal compounds
G03F 7/033
With binders: the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
G03F 7/0957
Having more than one photosensitive layer: with sensitive layers on both sides of the substrate
C09K 2019/0448
Characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group: the…