Patent ID: 8026116

Claim:
A method of manufacturing a display device, said method comprising: forming a conductive first scanning line and a conductive second scanning line arranged in parallel with each other, forming a first insulating film over said first scanning line and said second scanning line, and forming a semiconductor film over said first insulating film; forming a first protective mask for protecting a first channel region of said semiconductor film and a storage capacitance region of said semiconductor film, the first channel region being opposed to said first scanning line; and injecting an impurity of a first conduction type into a switching element region for forming at least a portion of a switching element in said semiconductor film, forming a second protective mask for protecting the switching element region of said semiconductor film; and injecting an impurity of a second conduction type opposite the first conduction type into a storage capacitance region for forming at least a portion of a storage capacitance element in said semiconductor film, wherein the semiconductor film is a continuous body of material extending from the storage capacitance element to said switching element, further comprising forming a metal interconnect between at least a portion of said switching element region and a portion of said storage capacitance region, and wherein the metal interconnect provides an electrical connection between different portions of a conductive region extending from the switching element region to the storage capacitance region, and further wherein the storage capacitance element is comprised of a portion of the second scanning line and a portion of the semiconductor film adjacent to the portion of the second scanning line, the portions of the second scanning line and the semiconductor film being separated by the first insulating film, said method further comprising: forming a second insulating film over the semiconductor film having said switching element region and said storage capacitance region injected with the impurity of the first conduction type and the impurity of the second conduction type, respectively; forming, in said second insulating film, a first contact hole and a third contact hole reaching semiconductor regions of the first conduction type; forming, in said second insulating film, a second contact hole reaching a semiconductor region of the second conduction type; connecting the semiconductor region of the first conduction type on one side of said first scanning line with the semiconductor region of the second conduction type on one side of said second scanning line by depositing a conductive material in said first contact hole and said second contact hole; and forming a data signal line by depositing a conductive material in said third contact hole.