Controlling an electronic device using chiplets
View Patent ↗An electronic apparatus including a common substrate, a plurality of controlled electronic devices disposed over the common substrate, and a wiring layer having a plurality of conductors formed on the common substrate. A plurality of chiplets are located over the common substrate, each chiplet having an independent substrate separate from the common substrate, each independent substrate having a bottom side opposing a top side with one or more connection pads formed on the bottom side of the chiplet, and each chiplet including circuitry for controlling functions of one or more of the controlled electronic devices. The chiplets are adhered to the common substrate with the bottom side of the chiplet closer to the common substrate than the top side of the chiplet, and each connection pad is electrically connected to one of the plurality of conductors.
1. An electronic apparatus, comprising:
a common substrate comprising an optical working area including a plurality of chiplet locations;
a plurality of controlled electro-optic devices disposed over the common substrate in the working area, each electro-optic device adapted to emit or absorb light;
a wiring layer comprising a plurality of conductors formed on the common substrate;
a plurality of chiplets located over the common substrate in the chiplet locations, each chiplet comprising an independent substrate separate from the common substrate, each independent substrate comprising a bottom side opposing a top side with one or more connection pads formed on the bottom side of the chiplet, each chiplet comprising circuitry for controlling functions of one or more of the controlled electro-optic devices; and
connection pads formed on the top side of one or more chiplets,
wherein the chiplets are adhered to the common substrate with the bottom side of the chiplet closer to the common substrate than the top side of the chiplet, and
wherein each connection pad on the bottom side of the chiplet is electrically connected to one of the plurality of conductors.
2. An electronic apparatus, comprising:
a common substrate comprising an optical working area including a plurality of chiplet locations;
a plurality of controlled electro-optic devices disposed over the common substrate in the working area, each electro-optic device adapted to emit or absorb light;
a wiring layer comprising a plurality of conductors formed on the common substrate;
a plurality of chiplets located over the common substrate in the chiplet locations, each chiplet comprising an independent substrate separate from the common substrate, each independent substrate comprising a bottom side opposing a top side with one or more connection pads formed on the bottom side of the chiplet, each chiplet comprising circuitry for controlling functions of one or more of the controlled electro-optic devices,
wherein the chiplets are adhered to the common substrate with the bottom side of the chiplet closer to the common substrate than the top side of the chiplet,
wherein each connection pad is electrically connected to one of the plurality of conductors,
wherein the bottom side of a chiplet comprises non-planar protruding structures, and
wherein the device further comprises complementary structures located on the common substrate comprising a shape complementary to the chiplet shape in the desired chiplet locations, the complementary structures configured to receive the non-planar protruding structures and physically align the chiplet to the common substrate.
3. The device of claim 1 , wherein the electrical connection between the connection pads and the conductors comprises an anisotropic conductive film or a thermal compression bond.
4. The device of claim 1 , wherein the controlled electronic devices comprise pixels in a display, sensors in an image sensor, or current generating circuits in a photovoltaic cell.
5. An electroluminescent display device, comprising:
a common substrate comprising a display area including a plurality of chiplet locations;
a plurality of pixels disposed over the common substrate in the display area, each pixel comprising:
a first electrode formed over the common substrate, one or more layers of light emitting material; and
a second electrode formed over the one or more layers of light-emitting material;
a metal wiring layer comprising a plurality of conductors formed on the common substrate;
a plurality of chiplets located over the common substrate in the chiplet locations, each chiplet comprising an independent substrate separate from the common substrate, each independent substrate comprising a bottom side opposing a top side with one or more connection pads formed on the bottom side of the chiplet, each chiplet comprising circuitry for controlling at least one pixel; and
connection pads formed on the top side of one or more chiplets,
wherein the chiplets are adhered to the common substrate with the bottom side of the chiplet closer to the common substrate than the top side of the chiplet,
wherein each connection pad on the bottom side of the chiplet is electrically connected to one of the plurality of conductors, and
wherein at least one connection pad is connected to each of the first or second electrodes.
6. The device of claim 2 , wherein the protruding structures are outside the electrical path of the conductors.