Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Wet etch processing










Image Number 4 for United States Patent #7651946.

A method of wet etching produces high-precision microneedle arrays for use in medical applications. The method achieves precise process control over microneedle fabrication, at single wafer or batch-level, using wet etching of silicon with potassium hydroxide (KOH) solution by accurately identifying the etch time endpoint. Hence, microneedles of an exactly required height, shape, sharpness and surface quality are achieved. The outcome is a reliable, reproducible, robust and relatively inexpensive microneedle fabrication process. Microneedles formed by KOH wet etching have extremely smooth surfaces and exhibit superior mechanical and structural robustness to their dry etched counterparts. These properties afford extra reliability to such silicon microneedles, making them ideal for medical applications. The needles can also be hollowed. Wet etched silicon microneedles can then be employed as masters to replicate the improved surface and structural properties in other materials (such as polymers) by moulding.








 
 
  Recently Added Patents
Memory access monitoring method and device
Systems and methods for electronic verification of vehicle insurance coverage
Method for improving the performance of browser-based, formula-driven parametric objects
Lubricating oil compositions
Integrated process for the manufacture of fluorinated olefins
Touchscreen with Z-velocity enhancement
Lubricant supplying device, process cartridge, and image forming apparatus
  Randomly Featured Patents
Corrugator device with a mould release device
Telecommunications switch
Joining and attachment piece for corrugated tubes
Primary radiator having improved receiving efficiency by reducing side lobes
Boat trailer
Male incontinence device
Injection mold for making a synthetic thermoplastic article having a tubular end portion
High speed log debarker
Rearview mirror
Framework of wireless network access device