Procedures, encompassing the following: Obtaining a structure (100) which includes the following: a substrate (102) comprising a first well region (104A) with a first
doping type and a second well region (104B) with a second
doping type, which is opposite to the first
doping type; and fins (106) which protrude from the substrate (102); Forming a structured etch
mask (202, 204) on the structure (100), wherein the structured etch
mask (202, 204) provides an opening (206) which is directly above a first fin (106b) of the fins (106), wherein the first fin (106b) is directly above the first trough area (104A);
Etching of the structure (100) through the structured
etching mask (202, 204), wherein the
etching removes the first fin (106b) and forms a depression (302) in the substrate (102) which extends from the first depression area (104A) to the second depression area (104B); and Forming a
dielectric material (402) between remaining sections of the fins (106) and within the depression (302), wherein a second fin (106c) of the fins (106) is immediately above the second depression area (104B) and is closest to the first fin (106b) along a
fin width direction, and the opening (206) is immediately above a first section of the second depression area (104B) between the first fin (106b) and the second fin (106b), and a width of the first section is less than a width of the second depression area (104B) between the first fin (106b) and the second fin (106c) along the
fin width direction.