Patent ID: 7910444

Claim:
A process, comprising: forming a first portion of an electronic device integrated on a semiconductor substrate, wherein forming the first portion includes forming first transistors each comprising a gate electrode projecting from the semiconductor substrate and respective source/drain regions; forming a second portion of the electronic device by steps including forming second transistors each comprising a gate electrode projecting from the semiconductor substrate and respective source/drain regions; forming in cascade a first protective layer and a first conformal insulating layer of a first thickness on the first and second portions of the electronic device; forming a first mask covering the first portion of the electronic device; removing first portions of the first conformal insulating layer not covered by the first mask; removing the first mask; forming a second conformal insulating layer of a second thickness on the first and second portions of the electronic device after removing the first portions of the first conformal insulating layer; and forming first spacers of a first width on side walls of the gate electrodes of the first portion of the electronic device and second spacers of a second width on side walls of the gate electrodes of the second portion of the electronic device by removing second portions of the first conformal insulating layer and first portions of the second conformal insulating layer until first portions of the protective layer are exposed, wherein removing the second portions of the first conformal insulating layer is performed after removing the first portions of the first conformal insulating layer and after forming the second conformal insulating layer on the first conformal insulating layer and on the second portion of the electronic device.