Metal working – Plural diverse manufacturing apparatus including means for... – Binding or covering and cutting
Patent
1979-10-15
1980-10-21
Culver, Horace M.
Metal working
Plural diverse manufacturing apparatus including means for...
Binding or covering and cutting
29583, 118 37, 118 76, 219 68, B23P 2304, B23P 2500
Patent
active
042285704
ABSTRACT:
An apparatus is provided for forming a large area photovoltaic cell into a plurality of photovoltaic cells on a common substrate and preparing the individual cells for an overlying layer of conductive material. A tool bit is urged against the polycrystalline materials forming the heterojunction to remove a preselected pattern and expose a layer of conductive material, tin oxide, on a supporting glass substrate. Tool bit pressure causes fracturing of the crystals to produce defined edges along the tool bit furrow. An electrical arc is produced to vaporize a portion of the exposed tin oxide to electrically isolate the individual photovoltaic cells. Applicator pens coat the edges of the polycrystalline material with preselected insulating films. Finally, a buffer wheel abrades a preselected metal onto the remaining exposed surface of the tin oxide to obtain an improved metallurgical and/or electrical contact between the tin oxide and the subsequent conductor layer. Indexing mechanisms are provided for positioning the large area cell relative to the various tools for providing a plurality of preparatory passes along the large area cell.
REFERENCES:
patent: 2248057 (1941-07-01), Bond
patent: 2680184 (1954-06-01), Cox
patent: 2744451 (1956-05-01), Lee
patent: 3438354 (1969-04-01), Luescher
patent: 3937915 (1976-02-01), Matsuo et al.
Bigham Herbert L.
Chamberlin Rhodes R.
Culver Horace M.
Photon Power, Inc.
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