| 摘要 |
804,011. Transistor assemblies. HUGHES AIRCRAFT CO. March 2, 1956 [March 24, 1955], No. 6705/56. Class 37. A transistor assembly comprises a transistor body, consisting of emitter and collector regions on opposite faces of a base region, which is fixed to an apertured plate mounted between and electrically connected to the flanges of a pair of conductive tubes forming a housing for the transistor body. Conductor members sealed to but insulated from the tubes extend towards the emitter and collector regions respectively. In one embodiment (Fig. 4) the regions are formed on a P-type Ge crystal 10 by fusion thereto of PbAs alloy bodies 12, 13 for 3 minutes at 725‹ C. The apertured plate 14 of " Kovar " (Registered Trade Mark) is dished and its edges welded or soldered between the flanges 28 of a pair of tubular Kovar members 20 which constitute the housing. Kovar conductors 22 to the ends of which are welded Kovar spring contacts 26 with tinned tips are previously sealed in the members by glass-to-metal seals 24. After assembly conductors 22 are heated to solder the spring contacts to the PbAs emitter and collector electrodes 12 and 13. In a further embodiment (Fig. 5) the spring contacts are replaced by rods 40 soldered into tubular coldrolled steel conductor members 36 which are bonded to the tubular member 33 also of steel, by means of sintered glass 42, formed under high pressure. One of the members is formed with a larger flange which is crimped over the other. In this embodiment the apertured plate is also of cold rolled steel. Si or an intermetallic compound may be used instead of Ge and a PNP junction body may replace the NPN body described above. |
