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
Level shifter and method of using the same
Method for manufacturing and reoxidizing a TiN/Ta.sub.2O.sub.5/TiN capacitor
Controller for soldering iron
Method and apparatus for monitoring wireless communication in hearing assistance systems
Scissors
Method of manufacturing toner
Process and intermediates for preparing lapatinib
  Randomly Featured Patents
Orthodontic suspension bracket and method of use
Motherboard testing device and testing method thereof
Rotary signature transfer device
Vibratory screed assembly for an asphalt paving machine
Three-dimensional image capturing device and recording medium
High density pattern template: materials and processes for the application of conductive pastes
Deep discharge battery dynamic charging system and method
Method and apparatus for synchronizing data in utility system
Printing machine registration target
Water-soluble graft polymers