7.
    发明专利
    未知

    公开(公告)号:DE2001534A1

    公开(公告)日:1970-11-19

    申请号:DE2001534

    申请日:1970-01-14

    Applicant: IBM

    Abstract: 1281811 Electrical testing INTERNATIONAL BUSINESS MACHINES CORP 8 Jan 1970 [15 Jan 1969] 1045/70 Heading H2E [Also in Division H1] An electrical testing apparatus comprises a rotary head 10 supporting a plurality of vacuum tubes 11 for holding devices 12 to be tested. Each testing station has contact blades 18 having raised contacting portions 19 which are cleaned on each cycle of head 10 by an abrasive stone 20. The resulting debris is cleared by air supplied to a nozzle 32 from a vacuum distributer which also supplies the vacuum to the vacuum tubes 11. The stone 20 is supported on an arm 21 and a wheel 29 on the arm 21 is urged by a spring 30 on to the top of a wall 28. Where there is an obstruction on the fixed part of the apparatus the wall 28 rises, and the wheel 29 rides up the wall and lifts the stone 20 clear of the obstruction. As well as test stations (17, Fig. 1, not shown) the apparatus includes a feed bowl (14) for feeding the devices 12 to the tubes 11, an orientor station (15) and a sorter (16) for receiving the tested devices. The devices may be semi-conductor chips, transistors, diodes, or integrated circuits. As an alternative to the stone 20 the contacts may be cleaned by a brush or a cleaning chemical, and instead of the air jet the debris may be removed by a brush.

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