1366 Technologies Inc.

Adam L Lorenz

Emanuel Michael Sachs

Ralf Jonczyk

Richard Lee Wallace, Jr

G D Stephen Hudelson

Richard L Wallace, Jr

Semi-conductor wafers with thin and thicker regions at controlled locations may be for Photovoltaics. The interior may be less than 180 microns or thinner, to 50 microns, with a thicker portion, at 180-250 microns. Thin wafers have higher efficiency. A thicker perimeter provides handling strength. Thicker stripes, landings and islands are for metallization coupling. Wafers may be made directly from a melt upon a template with regions of different heat extraction propensity arranged to correspond to locations of relative thicknesses. Interstitial oxygen is less than 6&#xd7;10atoms/cc, preferably less than 2&#xd7;10, total oxygen less than 8.75&#xd7;10atoms/cc, preferably less than 5.25&#xd7;10. Thicker regions form adjacent template regions having relatively higher heat extraction propensity; thinner regions adjacent regions with lesser extraction propensity. Thicker template regions have higher extraction propensity. Functional materials upon the template also have differing extraction propensities.

Methods and apparati for making thin semi-conductor wafers with locally controlled regions that are relatively thicker than other regions and such wafers

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Arlington, MA, United States of America

Adam L Lorenz