INTER-POLY OXIDE IN FIELD EFFECT TRANSISTORS
First Claim
1. A method of manufacturing a shielded gate field effect transistor comprising:
- forming a trench within a substrate;
forming a shield oxide material within the trench;
depositing a shield electrode material on the shield oxide material;
recessing the shield electrode material within the trench;
recessing the shield oxide material within the trench to widen an upper portion of the trench;
recessing the shield electrode material thus forming a recession; and
depositing an inter-poly oxide material on the shield electrode material into the recession, thus filling the recession.
3 Assignments
0 Petitions
Accused Products
Abstract
A method of forming a shielded gate field effect transistor includes forming a trench within a substrate and depositing a shield oxide material within the trench, which is then recessed. The method further includes depositing a shield electrode material on the shield oxide material and recessing the shield oxide material within the trench to widen an upper portion of the trench. The method further includes recessing the shield electrode material thus forming a recession and depositing an inter-poly oxide material on the shield electrode material into the recession, thus filling the recession. The method further includes forming a gate electrode above the inter-poly oxide material.
-
Citations
20 Claims
-
1. A method of manufacturing a shielded gate field effect transistor comprising:
-
forming a trench within a substrate; forming a shield oxide material within the trench; depositing a shield electrode material on the shield oxide material; recessing the shield electrode material within the trench; recessing the shield oxide material within the trench to widen an upper portion of the trench; recessing the shield electrode material thus forming a recession; and depositing an inter-poly oxide material on the shield electrode material into the recession, thus filling the recession. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A shielded gate field effect transistor comprising:
-
a substrate; a shield electrode; a gate electrode; a shield oxide between the shield electrode and the substrate; and an inter-poly oxide between the gate electrode and the shield electrode, wherein the inter-poly oxide is at least 800 angstroms thick. - View Dependent Claims (12, 13, 14, 15, 16, 17)
-
-
18. A method of manufacturing a shielded gate field effect transistor comprising:
-
recessing shield electrode material thus forming a recession; depositing an inter-poly oxide material with a thickness of at least 800 angstroms on the shield electrode material into the recession, thus filling the recession; and forming a gate electrode above the inter-poly oxide material. - View Dependent Claims (19, 20)
-
Specification