Semiconductor device manufacturing: process – Making field effect device having pair of active regions... – On insulating substrate or layer
Reexamination Certificate
2007-12-18
2007-12-18
Chen, Jack (Department: 2813)
Semiconductor device manufacturing: process
Making field effect device having pair of active regions...
On insulating substrate or layer
C438S154000, C438S163000
Reexamination Certificate
active
11256855
ABSTRACT:
A method for fabricating metal oxide semiconductor with lightly doped drain. In the method, the gate electrode, the LDD of the n-type MOS TFT, and the source/drain electrode of the p-type MOS TFT are defined simultaneously in one photolithography step. The contact holes and the source/drain electrode of the n-type MOS TFT are also defined simultaneously in one photolithography step. The invention employs only six photolithography steps to manufacture the metal oxide semiconductor, such as TFT, with lightly doped drain, thereby avoiding alignment errors, further improving yield and increasing throughput.
REFERENCES:
patent: 2004/0229416 (2004-11-01), Shih
patent: 2006/0076618 (2006-04-01), Kang
Au Optronics Corp.
Chen Jack
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