Showa Optronics Co., Ltd.

Nippon Electric Co., Ltd.

Kozo Ichikawa

Tadao Shima

Tadafumi Hoshiyama

An infrared detector comprises: first and second container members bonded to each other along an annular bonding portion to define a vacuum-sealed inner space, where the second container member has an infrared-transmissive property; an infrared detecting element disposed in the inner space; a first annular metallization layer formed on the bonding portion of the first container member; a second annular metallization layer formed on the bonding portion of the second container member; a solder metal for air-tightly bonding the first metallization layer and the second metallization layer; and a third metallization layer formed in a vicinity of one of the first and second metallization layers such that the third metallization layer overlaps the other of the first and second metallization layers at least partly.

Infrared detector with plurality of metallization between first and second container members

In an infrared detector package, a first annular metallized layer () is formed along the annular shoulder () of a casing member (), and a second annular metallized layer () is formed along the annular mating surface of a window member (). Brazing material () is integrally interposed between the first and second metallized layers. At least one of the first and second annular metallized layers comprises a mutually separated concentric portions (), and the brazing material extends across the two mutually separated concentric portions. During the manufacturing process, brazing material is deposited on one of the two mutually separated concentric portions, and is allowed to flow along the opposing metallized surface until the brazing material reaches the other of the two mutually separated concentric portions. Because the brazing material exposes a clean metallic surface as it flows so that the brazing material is properly interposed between the opposing annular metallized layer and the other of the mutually separated concentric portions of the corresponding annular metallized layer without any intervention of dross, oxidized film or other foreign matters. Thereby the brazing material ensures a favorable bonding and sealing performance.

Infrared detector package

An image tube comprises a conductive film along the inside surface of an insulating tube extending axially of the image tube between a photoelectric cathode and a fluorescent anode. The conductive film should be electrically connected to the photoelectric cathode and have an axial length between 1/2 and 3/4 of that of the insulating tube. The conductive film may be formed along the outside surface of the insulating tube and either together with or without a conventional semi-insulating layer formed along the inside surface of the insulating tube.

Growing community of inventors

Tokyo, Japan

Kozo Ichikawa