Patent ID: 11933966
Assignee: STMICROELECTRONICS S.R.L.
Field: Micro-structural and nano-technology (Chemistry)
Classification: CPC B  G  H | IPC B  G

Claim 15:
16. A method of making a picoprojector apparatus, comprising:
configuring a light source to be driven to generate a light beam according to an image to be generated;
defining a cavity in a die;
forming an anchorage portion in the die;
forming a tiltable structure to have a main extension in a horizontal plane defined by first and second horizontal axes perpendicular to each other;
elastically suspending the tiltable structure over the cavity using first and second supporting arms extending between the anchorage portion and opposite sides of the tiltable structure;
configuring first and second resonant piezoelectric actuation structures to be biased to cause rotation of the tiltable structure about a rotation axis parallel to the first horizontal axis;
resisting movement of the tiltable structure out of the horizontal plane and permitting torsion of the tiltable structure about the rotation axis utilizing first and second torsion springs coupled together at a first constraint region; and
configuring a driving circuit to supply electrical driving signals the first and second resonant piezoelectric actuation structures to cause rotation of the tiltable structure.