Patent ID: 7304776

Claim:
An integrated optical structure ( 100 ), comprising: a support wafer ( 101 ); in succession, three dielectric layers ( 102 , 103 , 104 ) located on said support wafer; a cavity ( 105 ) hollowed out through the three dielectric layers and into the support wafer, said cavity having two parallel walls ( 105 a , 105 b ), an end wall ( 105 c ) and a bottom ( 105 d ); an actuator ( 106 ) located within said cavity and comprising a moveable member ( 107 ) having i) a main branch ( 108 ) that extends parallel to said parallel walls ( 105 a , 105 b ), ii) spaced-apart transverse secondary branches ( 109 , 110 ) connected to said main branch, each second branch having a free lower surface spaced apart from said bottom of said cavity with a free space between the lower surface and said bottom of said cavity, and iii) fixed parts ( 111 , 112 ) projecting from said two parallel walls ( 105 a , 105 b ) and respectively extending between said transverse secondary branches so that sidewalls of said fixed parts lie parallel to sidewalls of said secondary branches, first electrodes ( 113 ) located on an upper surface of said transverse secondary branches, second electrodes ( 114 , 115 ) located on an upper surface of said fixed parts; exactly and only two external upper conducting regions ( 118 , 119 ) configured so that by supplying power to only said two upper conducting regions displaces the moveable member ( 107 ) of the actuator ( 106 ) with respect to the main branch ( 108 ); and connections connecting said second electrodes to said two external upper conducting regions, said connections including tracks ( 122 , 124 ) located between said dielectric layers and plural vias ( 123 , 125 ) that run up from the tracks to the upper conducting regions and the second electrodes.