NOVELTY - The filament sheet wafer (10) comprises a flat, rectangular shaped body having a length and a width of 156 mm, a first filament extending perpendicular to the width of the body, and a second filament spaced from the first filament and extending perpendicular to the width of the body, where the first and second filaments are partially encapsulated by a wafer material. The wafer material and the filaments form a portion of the body. The length of the flat body is defined by an upper length side and a lower length side. The width of the flat body is defined by left and right width sides.    USE - The filament sheet wafer is useful for manufacturing semiconductor devices such as solar cells, integrated circuits and micro-electro-mechanical systems.    ADVANTAGE - The wide filament sheet wafer can be economically, simply and easily manufactured with high yield and quality.    DETAILED DESCRIPTION - The filament sheet wafer (10) comprises a flat, rectangular shaped body having a length and a width of 156 mm, a first filament extending perpendicular to the width of the body, and a second filament spaced from the first filament and extending perpendicular to the width of the body, where the first and second filaments are partially encapsulated by a wafer material. The wafer material and the filaments form a portion of the body. The length of the flat body is defined by an upper length side and a lower length side. The width of the flat body is defined by left and right width sides that are parallel with the first and second filaments, where each side is partially defined by the wafer material. The wafer comprises a wafer material having grains with a minimum dimension of 2 centimeters; and has an irregular cross-sectional thickness between left width side and the right width side and an average thickness of 80-170 microns. The flat body has a bow of less than 2 millimeters, and has a top face with a surface roughness of 0.005-0.04 microns. The first filament is located within the body and parallel with the left width side. The second filament is located within the body and parallel with the right width side. The first filament and/or the second filament are exposed at the upper length side and/or the lower length side. An INDEPENDENT CLAIM is included for a method of forming a sheet wafer.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a sheet wafer.    Sheet wafer (10)    Pair of filaments. (12)