Fabrication method of Ti movable device
A manufacturing method and device technology, applied in the manufacture of microstructure devices, processes for producing decorative surface effects, coatings, etc., can solve problems such as poor fracture toughness, complex processes, large aspect ratio, etc., and achieve self-stress Small, uniform etching, bright surface effect
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[0037] Example 1: Using SU8 as the middle layer bonding
[0038] 1. Preparation of Titanium Substrate and Mask Generation
[0039] Such as figure 1 As shown, the device material is titanium. After annealing and chemical mechanical polishing, the surface of the titanium substrate is smooth and bright. The mask uses SU8 photoresist. SU8 is a kind of thick glue, and different thicknesses can be obtained at different speeds. Determine the mask thickness according to the required thickness of the device. In this embodiment, it is expected that the device height is 40 microns, and it is recommended to use SU8-3010 without dilution at a rotation speed of 1000 revolutions to obtain a thickness of about 15 microns.
[0040] 2. Define the mask pattern
[0041] The pattern is defined by photolithography and development. After pre-baking, exposure, development, and post-exposure baking (Post ExposureBake), a mask pattern with flat and steep sidewalls can be obtained, such as figure 2 Shown....
Example Embodiment
[0053] Example 2 Using BCB as the middle layer bonding
[0054] Steps 1 to 6 are the same as in the first embodiment. In step 7, a benzocyclobutene polymer (BCB, Benzocyclobutene) is used as the intermediate layer, and the pattern is defined before the bonding. First coat BCB on the bonded glass, then use photoresist as a mask to define the BCB pattern, and use the plasma dry etching method to etch the BCB pattern, and then proceed to combine it with step 6 to obtain The titanium substrate is bonded with patterns, such as Picture 10 Shown. The subsequent steps are similar to the first embodiment. In the final structural release process, only the filled Parylene material needs to be removed with oxygen plasma.
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