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    • 7. 发明申请
    • METHOD OF FORMING SHALLOW TRENCH ISOLATION USING DEEP TRENCH ISOLATION
    • 使用深层隔离分离法形成浅层分离的方法
    • US20050009290A1
    • 2005-01-13
    • US10615630
    • 2003-07-09
    • Jiang YanDanny Shum
    • Jiang YanDanny Shum
    • H01L21/762H01L21/763H01L21/76
    • H01L21/763H01L21/76229
    • A method of isolating active areas of a semiconductor workpiece. Deep trenches are formed in a workpiece between adjacent first active areas, and an insulating layer and a semiconductive material are deposited in the deep trenches. The semiconductive material is recessed below a top surface of the workpiece. Shallow trenches are formed in the workpiece between adjacent second active areas, and an insulating material is deposited in the shallow trenches and in the semiconductive material recess. The deep trenches may also be formed between an adjacent first active area and second active area. The first active areas may be high voltage devices, and the second active areas may be low voltage devices. The shallow trench isolation over the recessed semiconductive material in the deep trenches is self-aligned.
    • 隔离半导体工件的有源区的方法。 深沟槽在相邻的第一有源区域之间的工件中形成,并且绝缘层和半导体材料沉积在深沟槽中。 半导体材料在工件的顶表面下方凹进。 在相邻的第二有源区域之间的工件中形成浅沟槽,并且在浅沟槽和半导体材料凹部中沉积绝缘材料。 深沟槽也可以形成在相邻的第一有源区域和第二有源区域之间。 第一有源区可以是高压器件,而第二有源区可以是低电压器件。 在深沟槽中的凹陷半导体材料上的浅沟槽隔离是自对准的。