Patent ID: 6498069
Filing Date: 2002-12-24
Classification: H01L

Abstract:
A method of making a semiconductor device, comprising the steps of:filling trenches (30, 32-34) in a semiconductor substrate (11) with a first fill material (40, 42-44), where the trenches are lined with a first liner material (36-39) to form an isolation structure (50) in a first trench (30) of the trenches; removing the first fill material and the first liner material from a second trench (33) of the trenches for lining the second trench with a second liner material (46); filling the second trench with a second fill material (69) to produce a capacitance between the second fill material and the semiconductor substrate; forming a transistor in the semiconductor substrate; removing the first fill material from a fourth trench of the trenches; and depositing a dielectric material on the semiconductor substrate to produce a void in the fourth trench.