Patent ID: 6733616
Filing Date: 2004-05-11
Classification: H01L

Abstract:
A surface isolation device for isolating a predetermined area of a second surface of a wafer from an etching solution when the etching solution etches a first surface of the wafer to form a plurality of manifolds in the wafer, the surface isolation device comprising:a base for positioning the wafer; a first isolation ring positioned on the base for isolating the predetermined area from the etching solution; a fixture for fixing the wafer on the base; and a second isolation ring, the fixture fixing the second isolation ring on the first surface of the wafer so as to isolate an edge of the wafer from the etching solution; wherein when the fixture fixes the wafer on the base, the wafer adheres to the first isolation ring so as to isolate the predetermined area from the etching solution and the second surface of the wafer faces toward the base and the first isolation ring surrounds the predetermined area.