NOVELTY - An integrated structure of copper-indium-selenium (CIS)-type thin film solar cell comprises a laminated structure including p-type CIS-type optical absorption layer (13), buffer layer (14) and n-type transparent conductive layer. The buffer layer comprises a laminated structure of primary buffer layer (141) which contacts the p-type CIS-type optical absorption layer, a secondary buffer layer (142) contacting the primary buffer layer, and a tertiary buffer layer (143). The primary buffer layer contains cadmium, zinc or indium.    USE - Integrated structure of copper-indium-selenium-type thin film solar cell.    ADVANTAGE - The CIS-type thin film solar cell has high resistance. The series resistance in pn-junction portion of solar cell is reduced. The reinforcement of leak suppression is attained by increasing resistivity of secondary buffer layer.    DETAILED DESCRIPTION - An integrated structure of copper-indium-selenium (CIS)-type thin film solar cell comprises a laminated structure including p-type CIS-type optical absorption layer, buffer layer and n-type transparent conductive layer. The buffer layer comprises a laminated structure of primary buffer layer which contacts the p-type CIS-type optical absorption layer, a secondary buffer layer contacting the primary buffer layer, and a tertiary buffer layer which covers the end surface exposed by forming wiring pattern in optical absorption layer, primary buffer layer, secondary buffer layer and the end surface between the n-type transparent conductive film and secondary buffer layer. The primary buffer layer contains cadmium, zinc or indium. The secondary and tertiary buffer layers are formed of zinc oxide-type thin film.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view illustrating integrated structure of CIS-type thin film solar cell.    Glass substrate (11)    Optical absorption layer (13)    High-resistance buffer layer (14)    Primary buffer layer (141)    Secondary buffer layer (142)    Tertiary buffer layer (143)    Patterns (P1-P3)