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A new angle on antireflection coatings
Optics & Photonics
Antireflection (AR) coatings have a long history in optics, in applications ranging from lenses to advanced imaging systems. But for plastic optics in certain applications, such as exterior solar concentrators, coming up with an AR coating tough enough to stand up to the challenges of harsh environments has proved a tricky proposition.

US solar growth blows away previous records
The U.S. solar market nearly doubled its electricity-generating capacity last year, as 14.6 gigawatts (GW) of new photovoltaic capacity was installed throughout the country. There was a 95% increase in new solar installations over the previous year, when 7.4GW were installed, according to a new report from GTM Research and the Solar Energy Industries Association (SEIA).

Optically active thin films: Switchable thin films II
Vacuum Technology & Coating
This is the second column addressing switchable optical properties in thin films. Electrochromic (EC) devices were discussed last month. This month we address other switching mechanisms such as heat (thermochromic) and light (photochromic). The ideal window would be one with optical properties that could readily adapt in response to changing cli-climatic conditions or occupant preferences.

Researcher using kinetics, not temperature, to make ceramic coatings
Science Daily
A new study lays down ceramic coatings kinetically at room temperature. Coating at room temperature makes microelectronics design and fabrication more flexible and could someday lead to better, less expensive microelectronics components that underpin modern technology.

Innovations in polarimetry make thin-film semiconductors more feasible
All About Circuits
Researchers from Ludwig-Maximilians-Universitat (LMU), Rice University, and Los Alamos National Laboratory have developed a new polarimetry method to discover properties of thin-film semiconductors made of transition metal dichalcogenides.


What you need to know about aluminum evaporation
Aluminum is a very popular material for evaporation. We have many different sources that can be used to successfully evaporate aluminum. However, there are a few common problems that occur when evaporating this material. One problem that you may be aware of that aluminum wets to most surfaces and does not stay in the evaporation area. The other, more significant problem is that moltent aluminum is very corrosive and will corrode through most surfaces and cause the boat or box to break during the evaporation process. Spitting is not normally a problem. Tungsten is the most resilient of the materials to this corrosiveness. Below are some things to consider when choosing the right source for your application:

A) What is the maximum current you have available to apply to the source?
B) How thick of a coating are you attempting?
C) What is the distance from the source to the substrate?
D) Are you evaporating in an upward direction?
E) What length source will fit in to your mounting points?

After reviewing the information above, you may be able to select the right source for your process. If you need further assistance, please do not hesitate to contact us.

Join R.D. Mathis Company at these upcoming events

March 14-16 — APS, New Orleans Convention Center, New Orleans, La

April 17-21 — MRS Spring show, Phoenix Convention Center, Phoenix, Arizona

April 30 - May 4 — SVC Show, Rhode Island Convention Center, Providence, RI

September 20-22 — Rocky Mountain AVS, Westminster DoubleTree Hotel
Westminster, Co

October 3 — Southern Ca AVS, Holiday Inn – Buena Park
Anaheim, Ca

October 29 - November 3 — AVS Show, Tampa Convention Center
Tampa, Fl

November 26 - December 1 — MRS Fall Show, Hynes Convention Center
Boston, Ma

The Evaporator

R.D. Mathis Company
P.O BOX 92916
Long Beach, Ca 90809-2916
Telephone (562) 426-7049
Fax (562) 595-0907
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