| 摘要 |
821,830. Semi-conductor devices. MULLARD RADIO VALVE CO. Ltd. Aug. 29, 1955, No. 24726/55. Class 37. A PN junction semi-conductor device comprises a semi-conductor body enclosed in a casing and secured to a thermally conductive member having an elongated part projecting through the casing and provided with heat radiating fins. In the embodiment a junction transistor comprising an N-type germanium body in contact through indium collector electrode 3 and molybdenum layer 5 with the head of a copper bolt 6 is sealed within a metal housing 10 through which the threaded stem 7 of the bolt extends. The housing is fixed to a chassis 12 by means of a nut 10 comprising heat dissipating fins 16, insulation from the chassis being provided by washers 13 and tube 14. Connections 9 to the emitter 2 and ring base electrode are carried through glass beads 11 in the housing lid while the collector connection is to the housing itself. |
