The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 31, 1999
Filed:
May. 01, 1998
Nobuyoshi Tatoh, Itami, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A highly reliable air-tightly sealed container having a light transmissive window member formed of a borosilicate glass plate 4 and brazed to a cylindrical portion of a container side wall, the borosilicate glass plate being formed to a substantially right hexagonal shape and provided with a metallized portion 5 on an outer circumferential portion thereof with a circular light transmissive portion 6 left in the central part thereof, a diameter L.sub.1 of a circle inscribing the outer circumference of the borosilicate glass plate 4 and a diameter L.sub.2 of the light transmissive portion being in the relation of L.sub.2 /L.sub.1 .ltoreq.0.85. The thickness L.sub.3 of the borosilicate glass plate is 0.11-0.25 times as large as the diameter L.sub.1 mentioned above. The air-tightly sealed container uses a low-price borosilicate glass as the window member and free from the breakage of the borosilicate glass plate and the leakage of gas. A reliable photosemiconductor module can be obtained using the container.