Patent ID: 7479635

Claim:
An infrared detector package, comprising: a casing member defining a cavity therein and provided with an annular shoulder disposed around an opening of the cavity; an infrared detector device received in the cavity; a window member provided with an annular mating surface corresponding to the annular shoulder and having a high infrared transmissivity; a first annular metallized layer formed along the annular shoulder of the casing member; a second annular metallized layer formed along the annular mating surface of the window member; and brazing material integrally interposed between the first and second metallized layers; wherein one of the first and second annular metallized layers comprises a pair of mutually separated concentric portions while the other of the first and second annular metalized layers extends over a substantial part of each of the mutually separated concentric portions of the one annular layer, the brazing material extending across the pair of mutually separated concentric portions.