Photo coupler device molding including filler particles

Details Photo coupler device molding including filler particles Photo coupler device molding including filler particles

1982-05-28

1983-10-25

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Signal isolator

250227, G02B 2700

Patent

active

044121350

ABSTRACT:
A photo coupler device comprises only one layer having a resin material and addition particles provided for molding a pair of a light emitting element and a light receiving element. The addition particles are made of one from silica of crystal form or amorphous form, glass fibre and the like. The addition particles are suspended in the layer in a certain proportion equal to or below about 70% by weight in comparison with the weight of the resin material. A diameter of the addition particles is in the range of about several tens to about one hundred .mu.m. Preferably, the resin material is made of epoxy resin having phenol as a hardener in the case where the light emitting element provides its electroluminescence of infrared region. In another form of the present invention, an additional layer also having another type of resin material and the addition particles can be formed to mold the first layer containing the pair of the elements.

REFERENCES:
patent: 4095116 (1978-06-01), Felkel et al.
patent: 4112308 (1978-09-01), Olschewski et al.
patent: 4237382 (1980-12-01), Thillays

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