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    Abrading apparatus
    3.
    发明授权
    Abrading apparatus 失效
    装饰设备

    公开(公告)号：US3702042A

    公开(公告)日：1972-11-07

    申请号：US3702042D

    申请日：1970-11-25

    申请人： IBM

    发明人： COCHRAN THOMAS J ,  COUGHLIN CHARLES P ,  FICKER WALTER W ,  LENT CHARLES V ,  SULLIVAN JOSEPH M

    IPC分类号： H01C17/245 ,  B24C3/04

    CPC分类号： H01C17/245

    摘要： This patent discloses apparatus for altering the electrical characteristics of electrical and electronic components by trimming or abrading, the rate of abrading being variable and is responsive to changes in the electrical characteristics of the components during the abrading operation. Electrical components that have electrical characteristics that may be altered by the abrading apparatus include resistors, capacitors, inductors, semiconductive devices, and photocells. The apparatus includes electrical circuitry for both accurate control of the rate of abrasion and enabling production of electrical and electronic components to predetermined characteristics with unusually close manufacturing tolerances. The circuitry includes a highly sensitive Kelvin bridge at each abrading station, the circuitry being programmable for trim pretesting, control of the rate of abrading, and post-testing. The circuitry may also be programmed to abrade a discrete component to predetermined tolerances, and/or abrade one of a pair of components to a predetermined ratio of the electrical characteristic of one component to the electrical characteristic of the other of the pair. Additionally, the circuitry may be programmed to abrade one component in a connected closed loop of components to predetermined tolerances, for example ''''in circuit'''' abrading. The mechanical arrangement of the apparatus provides for sequentially abrading multiple electrical and electronic components which may be positioned on both the upper and lower surfaces of single insulating members such as ceramic substrates. The apparatus is fully mechanized for rapid processing of a high production product through sequential abrading stations and includes stations for rejecting out-of-tolerance components.

    摘要翻译： 该专利公开了通过修整或研磨来改变电气和电子部件的电气特性的装置，其研磨速率是可变的并且响应于在研磨操作期间部件的电特性的变化。 具有可由研磨装置改变的电特性的电气部件包括电阻器，电容器，电感器，半导体器件和光电池。