Friday, February 26, 2016

Transparent Ceramic

Transparent ceramic suits high-energy laser systems

    
Unlike fused silica and oxyfluoride glasses that cannot survive in some harsh environments, a new transparent ceramic for high-energy laser (HEL) systems developed at the US Naval Research Laboratory (NRL; Washington, DC) can withstand impact from rain droplets at 600 mph and sand particles at speeds up to 460 mph with no change in transmission parameters.
A new transparent ceramic survives under harsh environmental conditions with no change in transmission parameters
The transparent magnesium aluminate spinel (MgAl2O4) ceramic, developed as a window and dome material for protecting sensors operating from the UV to the mid-IR region to 5 µm, was designed with optimized low absorption loss of 6 ppm/cm to minimize the beam distortions and loss of output power that are measured as optical-path distortions in HEL systems. The ceramic spinel was made by hot-pressing ball-milled spinel powders at 1400–1650ºC for 2–4 hours using a uniform coating of a small amount of lithium fluoride sintering aid that was eliminated by evaporation prior to full densification. The NRL spinel powder (synthesized by an aqueous process) had crystallites 100–200 nm in size with excellent phase purity based on x-ray diffraction and chemical analysis, with an impurity content several orders of magnitude lower than commercially available spinel powders. Contact Jas Sanghera at jas.sanghera@nrl.navy.mil.
http://www.laserfocusworld.com/articles/print/volume-48/issue-02/newsbreaks/transparent-ceramic-suits-high-energy-laser-systems.html

Wednesday, February 24, 2016

CONVEX AND CONCAVE VACUUM CHUCK TABLE

Convex and concave shape vacuum chuck table

Though  in 99% cases porous ceramic vacuum chuck table goes with extremely flat surface,we do meet certain requirement to design the porous ceramic surface with convex or concave shapes to hold thin film and fragile substrate, this is challenging but I can assure you we never say "that is impossible",and indeed,prototypes are built and is in trial run in a customer's lab.












Please contact us to know :sales@semixicon.com

www.semixicon.com

Tuesday, February 23, 2016

Thin Film Vacuum Chuck

Thin Film Vacuum Chuck

semiXicon porous ceramic vacuum chucks are available for a wild array of shapes and sizes for thin film substrates and other flat fragile materials, the chuck’s superb flat surface of porous ceramic distributes the vacuum force equally to mitigate any potential deflection.
The chucks are of different flatness and parallelism depends upon customer’s applications, in most of the cases we are talking about several microns on the entire surface.
The frames to hold the porous ceramic insert can be alumina, stainless steel, or ceramic, we have specially developed the assembly technology which distinguish our chucks to brave harsh working environment with high temperature and humidity.
Some standard designs are
Square:            2”,4”,6”,8”,9”,12”,20”
Round:             2”,4”,5”,6”,8”,9”,12”
Rectangle:       2”*4”,4”*6”,6”*12,12”*20





sales@semixicon.com

Monday, February 1, 2016

20 Inch Porous Ceramic Chuck for Precision Laser Micro Machining

20 Inch Porous Ceramic Chuck for Precision  Laser Micro Machining

Work station for laser drilling,milling,cutting,patterning,scribing,ablation etc


Perfect for laser or photonic industy requesting high level of accuracy and extremely tight tolerances