Cap for photosemiconductor device case

Abstract

Abstract PURPOSE:To obtain a cap for a container wherein an optical system with a stable optical fiber with high YAG laser weldability by providing a part of the external surface of a metallic cylindrical material with a stainless material exposed surface with gold laser weldability. CONSTITUTION:A transparent glass plate 1 is provided with a nonreflective coating at both ends thereof, and is hermetically sealed against a ring plate 2 which is a glass sealing metal consisting of copal or a 42 Ni-Fe alloy by a low melting point glass 3. When the transparent glass plate 1 is bonded to the metal ring plate 2, the whole surface of the metal is Au plated. On the other hand, a stainless cylindrical material 4, whose ceiling having a window hole at the center, is plated with Ni and Au, which is then removed only at the external part 4a of the ceiling, leaving the material exposed. The ring plate 2 plated with Au is bonded to the internal surface of the ceiling of the cylindrical body 4 with an Au-Sn eutectic alloy 5, thereby forming a cap for the photosemiconductors.

Inventors

• 👤 Toru Kamata

Bibliographic Details