Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1983-08-16
1985-01-22
Powell, William A.
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
156656, 1566591, 427102, 427103, 430318, C23F 102, B44C 122, C03C 1500, C03C 2506
Patent
active
044950268
ABSTRACT:
A method for the manufacture of metallized semiconductor components, particularly power semiconductor components such as thyristors in which the semiconductor substrate is covered with at least three metal layers including a base layer attached to the substrate, an intermediate layer, and an upper layer upon which the various photoresist compositions are located to define the electrode structures, the intermediate layer being composed of a metal which has different solubility characteristics than either the upper or lower metal layers so that the various layers can be selectively etched by means of suitable solvents.
REFERENCES:
patent: 3686080 (1972-08-01), Banfield et al.
patent: 3883947 (1975-05-01), Kruger et al.
IBM Technical Disclosure Bulletin, vol. 20, No. 8, Jan. 1978, Chrome-Copper-Chrome Lift-Off Process, H. Dalal et al., pp. 3080-3081.
Powell William A.
Siemens Aktiengesellschaft
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