Compositions – Electrically conductive or emissive compositions
Patent
1978-06-08
1980-08-26
Hunt, Brooks H.
Compositions
Electrically conductive or emissive compositions
252512, 252513, 252514, 106 112, 106 113, 106 114, 106 116, 106 117, 106 118, 106 119, 29875, 29885, 75252, 75255, H01B 100, H01B 513
Patent
active
042194482
ABSTRACT:
An ink composition for deposition upon the surface of a semiconductor device to provide a contact area for connection to external circuitry is disclosed, the composition comprising an ink system containing a metal powder, a binder and vehicle, and a metal frit. The ink is screened onto the semiconductor surface in the desired pattern and is heated to a temperature sufficient to cause the metal frit to become liquid. The metal frit dissolves some of the metal powder and densifies the structure by transporting the dissolved metal powder in a liquid sintering process. The sintering process typically may be carried out in any type of atmosphere. A small amount of dopant or semiconductor material may be added to the ink systems to achieve particular results if desired.
REFERENCES:
patent: 3410722 (1968-11-01), Flanders et al.
patent: 3684533 (1972-08-01), Conwicke
patent: 3876433 (1975-04-01), Short
patent: 4054540 (1977-10-01), Michalchik
patent: 4102722 (1978-07-01), Shoop
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