Metal working – Method of mechanical manufacture – Electrical device making
Patent
1989-03-22
1990-03-20
Arbes, Carl J.
Metal working
Method of mechanical manufacture
Electrical device making
174 522, 206328, 264264, 357 70, H01R 4300
Patent
active
049089358
ABSTRACT:
In a hybrid integrated circuit encapsulation process, each lead array (14) is encompassed by an elongated C-shaped barrier member (17) which clamps onto the portions of the lead array adjacent the substrate (11); that is, opposite sides of a slot (18) in the barrier member grasp opposite sides of the leads. Thereafter, the uncured RTV silicone (15) is dispensed onto the substrate, flows over and encompasses chips (12) mounted on the surface of the substrate and is prevented from flowing along the leads (14) by the C-shaped members (17), each of which, due to its configuration, constitutes a barrier to fluid flow, either along the length of the various leads or over the top of the C-shaped member. In one embodiment, levers (19) may be integrated onto the C-shaped member opposite the substrate to aid in prying open the slot to permit the leads to be easily inserted into the C-shaped member. In another embodiment, the C-shaped member (21, 22) is made of a plastic material, and integrated with an O-shaped member (23) which may be compressed by a pincer instrument (26) so as to open the slot (24) for easy insertion of the leads into the C-shaped member.
REFERENCES:
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patent: 4250347 (1981-02-01), Fierkens
patent: 4271588 (1981-06-01), Nowak
patent: 4396796 (1983-08-01), Wong
patent: 4451973 (1984-06-01), Tateno et al.
patent: 4508758 (1985-04-01), Wong
patent: 4552818 (1985-11-01), Wong
patent: 4556896 (1985-12-01), Meddles
American Telephone and Telegraph Company AT&T Bell Laboratories
Anderson Roderick B.
Arbes Carl J.
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