| 摘要 |
1510914 Circuit housings BLISS & LAUGHLIN INDUSTRIES Inc 2 June 1976 [5 June 1975] 22818/76 Heading H1R [Also in Division B3] A case for a microelectronic circuit comprises an open top container 10 with upstanding sides 12 ending in an upper edge 13, having a chamber 28 at the inner corner, and a lid 11 seamweleded at 24 to the edge 13. The welded joint, which effects an hermetic seal, is made by a rolling welding electrode 25. Leads 20 to a component 21 pass through glass seals in the container wall. The container 10 is drawn from sheet stock, e.g. of steel or Fe-Ni-Cr alloy. The chamfered edge 28 is formed by suitably shaped dies in the drawing process or by subsequent grinding or milling. The upper flat edge 13 is a quarter of the thickness of the main sidewalls 12. |
