Resistless methods of fabricating FETs

Semiconductor device manufacturing: process – Making field effect device having pair of active regions... – Having schottky gate

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438172, 438572, 438690, H01L 21338

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active

057598800

ABSTRACT:
A method of fabricating semiconductor devices including forming a plurality of layers of semiconductor material on the surface of a substrate, forming a mask without using a resist on the layers which can be disassociated in-situ, removing an unmasked portion of the layers to form a semiconductor device with a gate region and opposed exposed source and drain surfaces, selectively growing source and drain contact regions on the exposed source and drain surfaces respectively, the contact regions defining opposed sidewalls adjacent the gate region, disassociating the mask, forming sidewall spacers on the sidewalls, forming a metal contact on the source, drain and gate regions with the spacers preventing intercontact therebetween, and depositing a passivating layer over the semiconductor device, with all of the previous steps being performed in-situ in a modular equipment cluster.

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Kramer et al, "Resistless High Resolution Optical Lithography on Silicon"; Appl. Phys. Lett. 67(20), Nov. 13, 1995.

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