Method for manufacturing a surface-mounted type optical semicond

Details Method for manufacturing a surface-mounted type optical semicond Method for manufacturing a surface-mounted type optical semicond

1996-09-26

1998-12-22

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Composite or multiple layer

264 19, 26427215, 26427217, 2643284, B29D 1100

Patent

active

058514490

ABSTRACT:
In manufacturing an optical semiconductor device, light-emitting elements are mounted on their respective printed boards of an insulating plate with a silver paste interposed therebetween. A sealing mold having a shape (a lens forming portion) necessary for forming a projected lens is adhered to the major surface of the insulating plate in accordance with each of the light-emitting elements of each of the printed boards. A liquid epoxy resin having a melt viscosity of 100 Pa.multidot.s to 200 Pa.multidot.s is continuously injected into the sealing mold with the lens forming portion of the sealing mold downward. The liquid epoxy resin is then hardened to form a projected, domed lens on each of the light-emitting elements. After that, the sealing mold is removed, and the insulating plate is separated for each of the light-emitting elements into surface-mounted optical semiconductor devices each having a projected, domed lens. Consequently, a lens having a large diameter can be formed in a short time, thereby increasing in luminance and improving in yield and quality, without increasing in manufacturing costs.

REFERENCES:
patent: 4292735 (1981-10-01), Thillays
patent: 4822536 (1989-04-01), Voinis et al.
patent: 5614131 (1997-03-01), Mukerji et al.
patent: 5635115 (1997-06-01), Konishi et al.

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