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    • 4. 发明申请
    • Method of forming ultra thin chips of power devices
    • 形成功率器件超薄芯片的方法
    • US20080242052A1
    • 2008-10-02
    • US11694888
    • 2007-03-30
    • Tao FengFrancois HebertMing SunYueh-Se Ho
    • Tao FengFrancois HebertMing SunYueh-Se Ho
    • H01L21/30
    • H01L21/3043H01L21/78
    • A method for making thin semiconductor devices is disclosed. Starting from wafer with pre-fabricated front-side devices, the method includes: Thinning wafer central portion from its back-side to produce a thin region while preserving original wafer thickness in the wafer periphery for structural strength. Forming ohmic contact at wafer back-side. Separating and collecting pre-fabricated devices. This further includes: Releasably bonding wafer back-side onto single-sided dicing tape, in turn supported by a dicing frame. Providing a backing plate to match the thinned out wafer central portion. Sandwiching the dicing tape between wafer and backing plate then pressing the dicing tape to bond with the wafer. With a step-profiled chuck to support wafer back-side, the pre-fabricated devices are separated from each other and from the wafer periphery in one dicing operation with dicing depth slightly thicker than the wafer central portion. The separated thin semiconductor devices are then picked up and collected.
    • 公开了制造薄半导体器件的方法。 从具有预制的前端器件的晶片开始,该方法包括:从其背面将晶片中心部分变薄以产生薄区域,同时在晶片周边保留原始晶片厚度以获得结构强度。 在晶圆背面形成欧姆接触。 分离和收集预制设备。 这还包括:将晶片背面可释放地粘合到单面切割胶带上,然后由切割架支撑。 提供背板以匹配变薄的晶片中心部分。 将切割胶带夹在晶片和背板之间,然后按压切割胶带与晶片结合。 利用阶梯型卡盘来支撑晶片背面,在一个切割操作中,预制的装置彼此分离并且与晶片周边分离,切割深度比晶片中心部分稍厚。 然后拾取并收集分离的薄半导体器件。