Patent ID: 9614118
Date: 2017-04-04
CPC Classifications: H01L,Y02E,Y02P

Claim:
1. A method for deposition of one or more elements and compounds onto a solar cell substrate comprising: a. providing a substrate; b. providing one or more elements and compounds for deposition to said substrate; c. providing a housing; d. providing a transporting apparatus to transport said substrate in and out of said housing; e. placing said substrate onto said transporting apparatus and having said transporting apparatus transport said substrate into said housing; f. providing one or more tubing apparatus to deliver powders of said one or more elements and compounds to said housing wherein said tubing apparatus is comprised of one or more feeder tubes located outside of said housing and joined to said housing; a plurality of source material tubes located outside of said housing and joined to said feeder tubes; a plurality of valves located inside of said source material tubes sufficient to block access between said source material tubes and said feeder tubes; one or more heating tubes located inside of said housing and connected to said feeder tubes; g. placing said one or more elements and compounds into said source material tubes; h. opening said valves to allow said one or more elements and compounds to move into said feeder tubes; i. providing a portion of carrier gas and feeding said carrier gas into said feeder tubes; j. allowing said carrier gas to carry said one or more elements and compounds from said feeder tubes to said heating tubes; k. providing one or more thermal sources to heat said housing and said heating tubes and heating said housing and said heating tubes; l. vaporizing said one or more elements and compounds inside said heating tubes into a vapor and allowing said vapor to leave said heating tubes; wherein said heating tubes comprise upper and lower portions; wherein said lower portions face said substrate and said upper portions are opposite to said lower portions; wherein only said lower portions are permeable to said vapor and said carrier gas; m. allowing said one or more elements and compounds to deposit onto said substrate after said one or more elements and compounds leave said heating tubes; n. transporting said substrate outside of said housing after said one or more elements and compounds are deposited onto said substrate.