Methods of manufacturing microdevices in laminates, lead frames, packages, and printed circuit boards
View Patent ↗Systems and methods for producing micromachined devices, including sensors, actuators, optics, fluidics, and mechanical assemblies, using manufacturing techniques of lead frames, substrates, microelectronic packages, printed circuit boards, flex circuits, and rigid-flex materials. Preferred embodiments comprise using methods from post-semiconductor manufacturing to produce three-dimensional and free-standing structures in non-semiconductor materials. The resulting devices may remain part of the substrate, board or lead frame which can then used as a substrate for further packaging electronic assembly operations. Alternatively, the devices may be used as final components that can be assembled within other devices.
1. A method of manufacturing a free standing micro-device, comprising:
(a) preparing a first carrier layer, the first carrier layer being a laminate layer;
(b) preparing a second carrier layer, the second carrier layer being a laminate layer and being manufactured separately from the first carrier layer; and
(c) bonding the first carrier layer to the second carrier layer to produce the free standing micro-device.
2. The method of claim 1 wherein one of the first carrier layer and second carrier layer is copper foil.
3. The method of claim 1 wherein the a material is electroplated on one or more of the first carrier layer and the second carrier layer.
4. The method of claim 1 wherein multiple free standing micro-devices are manufactured in a batch, wherein each of the first carrier layer and the second carrier layer carries a plurality of free standing micro-devices.
5. The method of claim 1 wherein the first carrier layer and second carrier layer are bonded against a third material by lamination, molding, deposition, or electroplating.
6. The method of claim 5 wherein the third material includes openings and structures.
7. The method of claim 1 further comprising etching away at least a portion of the first carrier layer and second carrier layer to reveal a freestanding micro device structure.
8. The method of claim 1 wherein one or more of the first carrier layer and the second carrier layer is a laminate comprising more than one sheet.
9. The method of claim 1 wherein the free standing micro-device is made from multiple layers of material.
10. The method of claim 1 wherein the free standing micro-device is made from multiple layers of material, each having a different pattern.
11. The method of claim 1 wherein the free standing micro-device is made from photosensitive material formed by lithography.
12. The method of claim 1 wherein the free standing micro-device is made from a material formed by depositing through a stencil.
13. The method of claim 1 wherein the free standing micro-device is made from a material formed by selective deposition, wherein the selective deposition is one of nozzle-based dispensing or printing (ink-jet or offset).
14. The method of claim 1 further comprising mechanical shaping or pre-etching one or more of the first carrier layer and the second carrier layer.
15. The method of claim 1 further comprising micropatterning structures on both sides of one or more of the first carrier layer and the second the carrier layer.
16. The method of claim 1 wherein the free standing micro-device is made from a material formed by deposition and subsequent cutting or etching.
17. The method of claim 1 wherein the free standing micro-device is movable.
18. The method of claim 1 , wherein one or more materials are removed after bonding the first carrier layer to the second carrier layer.
19. The method of claim 18 , wherein the one or more materials are removed by one or more of solution etching, vapor etching, heating, evaporation, and displacement.
20. The method of claim 1 , wherein preparing one or more of the first carrier layer and the second carrier layer consists of one or more manufacturing processes including lithography, etch, electroplating, machining, abrasion, punching, drilling, bonding, welding, electric discharge.