Lead frame material and process for manufacturing the same
AssigneeIndustrial Technology Research Institute
InventorsChun-Hsun Chu, Shyi-Yi Chen, Jui-Fen Pai
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Abstract
The present invention provides a lead frame material and a process for manufacturing a lead frame material. The process includes forming an intermediate layer on a lead frame substrate by vacuum deposition and forming a top protective layer on the intermediate layer by vacuum deposition. By using vacuum deposition, the coating material can be selected from a wider variety of materials; thus, coatings with novel compositions can be formed. The intermediate layer can be Ni, Ag, W, Zn, Cr, Mo, Cu, Sn, Al, Ta, Co, Nb, or alloys thereof, and the top protective layer can be Pt, Ir, Re, Ru, Rh, Pd, Au, Ag, or alloys thereof.
Claims8
A process for manufacturing a lead frame material, comprising:
- forming an intermediate layer on a lead frame substrate by chemical vapor deposition, wherein the intermediate layer is composed of at least one pure metal or a metal alloy and the substrate is made of a material selected from copper, copper alloy, and Fe—Ni alloy;
- and
- forming a top protective layer on the intermediate layer by chemical vapor deposition, wherein the top protective layer is composed of at least one pure noble metal or a noble metal alloy.
A lead frame material, comprising:
- a lead frame substrate made of a material selected from the group consisting of copper, copper alloy, and Fe—Ni alloy;
- an intermediate layer formed on the lead frame substrate, wherein the intermediate layer is composed of at least one metal selected from the group consisting of Ni, Ag, W, Zn, Cr, Mo, Cu, Sn, Al, Ta, Co, Nb, and alloys thereof;
- and
- a top protective layer formed on the intermediate layer, wherein the top protective layer is composed of at least one noble metal selected from the group consisting of Pt, Ir, Re, Ru, Rh and alloys thereof.
Dependencies are inferred from the claim text.