(JP9031683-A)      A thin film made of Cu, In, S and Se is produced by adding thiourea to a soln. contg. copper sulphate, indium sulphate and selenium dioxide which is acidified with sulphuric acid. Any resulting precipitant material is removed before the soln. is used in an electrolytic process to coat an electrically conductive substrate.    USE -   In the productivity of thin film solar cells.    ADVANTAGE -   Replaces the vacuum film producing method which involved low prodn. yield and high costs.    (US5695627-A)      A thin film made of Cu, In, S and Se is produced by adding thiourea to a soln. contg. copper sulphate, indium sulphate and selenium dioxide which is acidified with sulphuric acid. Any resulting precipitant material is removed before the soln. is used in an electrolytic process to coat an electrically conductive substrate.    USE -   In the productivity of thin film solar cells.    ADVANTAGE -   Replaces the vacuum film producing method which involved low prodn. yield and high costs.    (DE19630321-C2)      A thin film made of Cu, In, S and Se is produced by adding thiourea to a soln. contg. copper sulphate, indium sulphate and selenium dioxide which is acidified with sulphuric acid. Any resulting precipitant material is removed before the soln. is used in an electrolytic process to coat an electrically conductive substrate.    USE -   In the productivity of thin film solar cells.    ADVANTAGE -   Replaces the vacuum film producing method which involved low prodn. yield and high costs.    (JP3089994-B2)      A thin film made of Cu, In, S and Se is produced by adding thiourea to a soln. contg. copper sulphate, indium sulphate and selenium dioxide which is acidified with sulphuric acid. Any resulting precipitant material is removed before the soln. is used in an electrolytic process to coat an electrically conductive substrate.    USE -   In the productivity of thin film solar cells.    ADVANTAGE -   Replaces the vacuum film producing method which involved low prodn. yield and high costs.