Method for forming rectangular-shaped spacers for...

Details Method for forming rectangular-shaped spacers for... Method for forming rectangular-shaped spacers for...

2006-04-04

2006-04-04

Tran, Mai-Huong (Department: 2818)

Semiconductor device manufacturing: process

Coating with electrically or thermally conductive material

Insulated gate formation

C257S336000, C257S408000, C257S411000, C438S261000, C438S287000, C438S303000, C438S305000, C438S778000

Reexamination Certificate

active

07022596

ABSTRACT:
A semiconductor device and method of making the same forms a spacer by depositing a spacer layer over a substrate and a gate electrode and forms a protective layer on the spacer layer. The protective layer is dry etched to leave a thin film sidewall on the spacer layer. The spacer layer is then etched, with the protective layer protecting the outer sidewalls of the spacer layer. This etching creates spacers on the gate that have substantially vertical sidewalls that extend parallel to the gate electrode sidewalls. The I-shape of the spacers prevent punch-through during the source/drain ion implantation process, providing an improved source/drain implant dose profile.

REFERENCES:
patent: 4488351 (1984-12-01), Momose
patent: 6004851 (1999-12-01), Peng
patent: 6323519 (2001-11-01), Gardner et al.
patent: 6440875 (2002-08-01), Chan et al.
patent: 2002/0140100 (2002-10-01), Yokoyama
patent: 2003/0045061 (2003-03-01), Lin et al.
patent: 2003/0227054 (2003-12-01), Saiki

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