Patent ID: 6891245

Claim:
A semiconductor having a first structure, a second structure and a third structure, the first structure comprising: a base layer formed from an insulator; a first oxide layer formed in physical contact with the base layer, the first oxide layer having a first thickness; and a second oxide layer formed on the base layer, the second structure comprising the base layer, the first oxide layer, and another layer, wherein the second oxide layer is converted to another material to form the another layer, the third structure comprising the base layer and the first oxide layer, wherein the third structure is produced by a process including simultaneously exposing the another material and the first oxide layer of the second structure to an etching solution such that the another material is removed while insubstantially diminishing the first oxide layer, wherein the first oxide layer is an insubstantially diminished field oxide and is insubstantially diminished relative to the first thickness.