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    • 25. 发明授权
    • Flash memory structure and fabrication method thereof
    • 闪存结构及其制造方法
    • US07445995B2
    • 2008-11-04
    • US11531954
    • 2006-09-14
    • Ming Tang
    • Ming Tang
    • H01L21/336
    • H01L29/66825H01L21/28273H01L27/115H01L27/11553H01L29/7885
    • A flash memory structure comprises a semiconductor substrate, a source region, a drain region, a first insulating dielectric layer, a floating gate, a second insulating dielectric layer, and a control gate. The semiconductor substrate has a first top surface and a second top surface that is lower than the first top surface. The source region and the drain region are respectively in the second top surface and the first top surface of the semiconductor substrate, and the semiconductor substrate connecting the source region and the drain region is a vertical channel region. The whole channel region is covered by the first insulating dielectric layer, the floating gate, the second insulating dielectric layer, and the control gate in turn.
    • 闪存结构包括半导体衬底,源极区,漏极区,第一绝缘介电层,浮栅,第二绝缘介质层和控制栅。 半导体衬底具有比第一顶表面低的第一顶表面和第二顶表面。 源极区域和漏极区域分别位于半导体衬底的第二顶表面和第一顶表面中,并且连接源极区域和漏极区域的半导体衬底是垂直沟道区域。 整个通道区域依次由第一绝缘介电层,浮置栅极,第二绝缘介电层和控制栅极覆盖。
    • 27. 发明授权
    • Process for grinding a gear tooth blank to form an involute gear tooth
    • 用于研磨齿轮齿形坯以形成渐开线齿轮齿的工艺
    • US4833836A
    • 1989-05-30
    • US80481
    • 1987-07-31
    • Ming Tang
    • Ming Tang
    • B23F5/06
    • B23F5/06
    • A process for grinding a gear tooth blank to form an involute gear tooth includes the steps: setting a predetermined cutting rate which fails to result in burning between a grinding wheel and the gear tooth blank; determining the area of the tooth face of the gear tooth blank to be removed for respective grinding strokes in accordance with the predetermined cutting rate so that the metal removal amount of respective grinding strokes approaches to a constant except that the metal removal amount of the last grinding stroke may be smaller than the constant; and effecting the relative involute generating movement between the gear tooth blank and the grinding wheel in accordance with the respective areas of the tooth face to be removed for removing the metal within the respective areas from the gear tooth blank in a step-by-step manner to form an involute gear tooth.
    • 用于研磨齿轮坯料以形成渐开线齿轮齿的方法包括以下步骤:设定不能在砂轮和齿轮齿坯之间燃烧的预定切削速度; 根据预定的切割速度确定要除去的齿轮齿的齿面的面积,使得各研磨冲程的金属去除量接近常数,除了最后研磨的金属去除量 中风可能小于常数; 并且根据要移除的齿面的相应区域来实现齿轮齿坯和砂轮之间的相对渐开线产生运动,以一步一步的方式从齿轮齿坯除去相应区域内的金属 以形成渐开线齿轮齿。