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
Process for the production of electric energy by the excitation and capture of electrons from ground or water sources
Round carrying case
Generation of interpolated samples for decision based decoding
Capacitance sensing
Automated incorporation of expert feedback into a monitoring system
Output circuit
Display unit and display method
  Randomly Featured Patents
Coarse-fine focusing device for precision machinery
Nitrate esters of corticoid compounds and pharmaceutical applications thereof
Dimmer circuit with improved ripple control
Process control for flash concentrating solutions containing polyolefins
Secondary side-driven half-bridge power supply
PC parallel port structure partitioned between two integrated circuits interconnected by a serial bus
Multipath interconnect with meandering contact cantilevers
Data processing system including cache memory for rapidly converting a logical address into a physical address using shared memory flag
Pyridine compounds useful as N-type calcium channel antagonists
Method and apparatus for manufacturing a solar energy collector