EPROM semiconductor device erasable with ultraviolet rays and ma

Details EPROM semiconductor device erasable with ultraviolet rays and ma EPROM semiconductor device erasable with ultraviolet rays and ma

1988-07-21

1990-11-20

Chaudhuri, Olik

Fishing, trapping, and vermin destroying

H01L 2156

Patent

active

049719300

ABSTRACT:
An EPROM device erasable with ultraviolet rays is made with a container of plastic material opaque to ultraviolet rays having a window overlying the semiconductor chip. Plastic material transparent to ultraviolet rays fills the interior space of the container over said chip. The container is formed by moulding of the mass of transparent plastic material previously formed on the semiconductor chip, or a container formed preliminarily is filled with a semiconductor chip and then with a mass of transparent plastic material and finally closed with a transparent lens which fixes the thickness of the transparent mass, distributing it uniformly in the interior space of the container.

REFERENCES:
patent: 3622419 (1971-11-01), London
patent: 4460915 (1984-07-01), Engel
patent: 4491857 (1985-01-01), McElroy
patent: 4644384 (1987-02-01), Charoensakvirochana
patent: 4663833 (1987-05-01), Tanaka et al.
patent: 4665426 (1987-05-01), Allen et al.
patent: 4697203 (1987-09-01), Sakai et al.
patent: 4707725 (1987-11-01), Ito

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