US 9,810,956 B2
Liquid crystal display device, semiconductor device, and electronic appliance
Hajime Kimura, Kanagawa (JP)
Assigned to Semiconductor Energy Laboratory Co., Ltd., Atsugi-shi, Kanagawa-ken (JP)
Filed by Semiconductor Energy Laboratory Co., Ltd., Atsugi-shi, Kanagawa-ken (JP)
Filed on Dec. 3, 2015, as Appl. No. 14/957,746.
Application 14/957,746 is a continuation of application No. 12/904,537, filed on Oct. 14, 2010, granted, now 9,207,504.
Application 12/904,537 is a continuation of application No. 11/695,898, filed on Apr. 3, 2007, granted, now 9,213,206, issued on Dec. 15, 2015.
Claims priority of application No. 2006-105618 (JP), filed on Apr. 6, 2006.
Prior Publication US 2016/0154283 A1, Jun. 2, 2016
Int. Cl. G02F 1/136 (2006.01); G02F 1/1343 (2006.01); H01L 27/12 (2006.01); G02F 1/1333 (2006.01); G02F 1/1335 (2006.01); G02F 1/1337 (2006.01); G02F 1/1368 (2006.01); H01L 29/786 (2006.01); G02F 1/1362 (2006.01)
CPC G02F 1/134309 (2013.01) [G02F 1/1337 (2013.01); G02F 1/1368 (2013.01); G02F 1/13439 (2013.01); G02F 1/133345 (2013.01); G02F 1/133514 (2013.01); G02F 1/134363 (2013.01); G02F 1/136213 (2013.01); G02F 1/136286 (2013.01); H01L 27/124 (2013.01); H01L 27/1225 (2013.01); H01L 27/1255 (2013.01); H01L 29/7869 (2013.01); H01L 29/78696 (2013.01); G02F 1/1362 (2013.01); H01L 2924/0002 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A display device comprising:
a substrate;
a first pixel, a second pixel, and a third pixel over the substrate, each of the first pixel, the second pixel, and the third pixel comprising:
a transistor comprising:
a gate electrode on and in contact with the substrate;
a first insulating film over the gate electrode; and
a compound semiconductor film overlapping with the gate electrode with the first insulating film interposed therebetween, the compound semiconductor film comprising In, Ga, and Zn;
a second insulating film over the compound semiconductor film;
a wiring on and in contact with the second insulating film and electrically connected to the compound semiconductor film;
a first conductive film on and in contact with the second insulating film;
a pixel electrode over the second insulating film and electrically connected to the compound semiconductor film via the first conductive film;
a capacitor electrically connected to the pixel electrode, the capacitor comprising:
a second conductive film on and in contact with the substrate;
the second insulating film over the second conductive film; and
a third conductive film on and in contact with the second insulating film and overlapping with the second conductive film with the second insulating film interposed therebetween,
wherein the second insulating film comprises silicon oxide,
wherein the first pixel comprises a red color filter between the second insulating film and the pixel electrode of the first pixel,
wherein the second pixel comprises a green color filter between the second insulating film and the pixel electrode of the second pixel,
wherein the third pixel comprises a blue color filter between the second insulating film and the pixel electrode of the third pixel, and
wherein the red color filter overlaps with the compound semiconductor film in each of the first pixel, the second pixel, and the third pixel.