Semiconductor device

Active solid-state devices (e.g. – transistors – solid-state diode – Field effect device – Having insulated electrode

Reexamination Certificate

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Details

C257S349000, C257S350000, C257S351000, C257S374000, C257S466000, C257S618000

Reexamination Certificate

active

07067881

ABSTRACT:
A semiconductor device and its manufacturing method are provided which can properly avoid reduction of isolation breakdown voltage without involving adverse effects like an increase in junction capacitance. Impurity-introduced regions (11) are formed after a silicon layer (3) has been thinned through formation of recesses (14). Therefore n-type impurities are not implanted into the portions of the p-type silicon layer (3) that are located between the bottoms of element isolation insulating films (5) and the top surface of a BOX layer (2), which avoids reduction of isolation breakdown voltage. Furthermore, since the impurity-introduced regions (11) are formed to reach the upper surface of the BOX layer (2), the junction capacitance of source/drain regions (12) is not increased.

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S. Maeda, et al., Symposium on VLSI Technology Digest of Technical Papers, pp. 154-155, “Impact of 0.18μm SOI CMOS Technology Using Hybrid Trench Isolation with High Resistivity Substrate on Embedded RF/Analog Applications”. 2000.
Y. Hirano, et al., IEEE, IEDM, pp. 467-470, “Impact of 0.10 μm SOI CMOS With Body-Tied Hybrid Trench Isolation Structure to Break Through the Scaling Crisis of Silicon Technology”, 2000.
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