Patent ID: 7910478

Claim:
A method of manufacturing a semiconductor device, comprising: a connection pad forming step of forming connection pads on a substrate where an integrated circuit portion having a plurality of wirings are formed, the connection pads being electrically connected to said integrated circuit portion; a film forming step of forming an insulating film and stacking a protective film on the insulating film to form a stacked structure having connection pad exposing holes to expose portions of said connection pads therethrough; a sub-line forming step of forming sub-lines filling said connection pad exposing holes and covering portions of the exposed surface of said protective film; a coating film forming step of forming a coating film covering said sub-lines and said protective film; a dry film sticking step of sticking a dry film onto said coating film; a through hole forming step of forming through holes extending through said coating film and said dry film to expose parts of said sub-lines; an electrode forming step of forming external connection electrodes filling said through holes; and a sealing layer forming step of removing said dry film and forming a sealing layer covering said coating film and side surfaces of said external connection electrodes.