Phosphor Screens

At Dr. Gassler Electron Devices we are using several different technologies to coat a substrate with phosphor:

  • Sedimentation - the phosphor grains are “glued” together with Potassium-Silicate. Screen thickness can be adjusted from 10 -100 µm
  • Serigraphic printing - the phosphor is printed through a few micrometer wide mesh onto the substrate. Particle size typically 2-8 µm, screen thickness from a few to 20 µm adjustable, this process delivers phosphor coatings with very high brightness and resolution
  • Brushing - the phosphor is pressed with a specific rotating foam into a thin layer of glue. Suitable for small screens from 5 to 30 millimeter diameter, phosphor coatings with particle size 2-3 µm are very dense with high resolution

We can provide two different ways to ensure the electrical contact of the plate:

  • ITO Coating directly onto the substrate. Typically, the ITO coating is sputtered onto the glass substrate, followed by a printed phosphor layer on top.
  • The phosphor is printed directly to the glass and is covered with a thin layer of evaporated aluminum. The electron beam passes easily through the aluminum. The light created by the phosphor is reflected by the aluminum towards the viewer direction and increases the brightness. Additionally, all disturbing light from a glowing substrate is blocked by the aluminum and contrast is significantly enhanced.

RHEED Screen Holder

RHEED-Screens are very sensitive against any kind of contacts by fingertips, screwdriver or tweezers. The phosphor surface can be damaged quite easily.
That's why we created our own "Easy-to-use"- RHEED Screen Holder. No tools are required to mount the RHEED Screen, therefore no unintentional damages can hurt your new RHEED Screen. A detailed Manual how to mount a screen is delivered with each holder.
We can supply RHEED Screen Holder for all standard screen diameter of 36 mm, 55 mm, 93 mm and 135 mm 

Custom designed Phosphor Coatings

Our decades of experience in all kinds of phosphor coatings allows us to offer the best suitable technique also for a bit exotic application. Whenever your application or set up requires the visualization of a charged particles beam, we may be able to coat your part with the scintillator you need.
In close co-operation with our partners we develop individual phosphor coatings on almost every suitable substrate, shape or design – from single pieces to serial production.

Just tell us your requirement and together we will find a solution. 

Article # Glass type Diameter (mm) Thickness (mm) Phosphor Color Conductivity via Remarks
1030 Borosilicate 52 3.2 P43 Green Aluminum  
1017 Borosilicate 93 3.2 P43 Green Aluminum  
1023 Borosilicate 93 3.2 P43 Green Aluminum 30 mm free Sector
1027 Borosilicate 93 3.2 P11 Blue Aluminum 30 mm free Sector
1026 Borosilicate 140 3.2 P43 Green Aluminum  
               
1019 Borosilicate 93 3.2 P1 Green ITO  
1020 Borosilicate 93 3.2 P11 Blue ITO  
1021 Borosilicate 93 3.2 P1 Green ITO  
1035 Borosilicate 93 3.2 P15 Green ITO  
1028 Borosilicate 135 3.2 P1 Green ITO  
1015 Borosilicate 143 3.2 P43 Green ITO  
1029 Borosilicate 143 3.2 P1 Green ITO  
               
1006 F2 36 5 P43 Green Aluminum  
1007 F2 55 5 P43 Green Aluminum  
1008 F2 93 5 P43 Green Aluminum  
1009 F2 135 5 P43 Green Aluminum  
               
1010 F2 36 5 P43 Green ITO  
1011 F2 55 5 P43 Green ITO  
1012 F2 93 5 P43 Green ITO  
1034 F2 93 5 P11 Blue ITO  
1013 F2 135 5 P43 Green ITO  
               
1001 RD50 36 5 P43 Green Aluminum  
1005 RD50 36 5 P43 Green Aluminum  
1004 RD50 55 5 P43 Green Aluminum  
1022 RD50 61 5 P43 Green Aluminum  
1002 RD50 93 5 P43 Green Aluminum  
1031 RD50 93 5 P43 Green Aluminum 30 mm free Sector
1032 RD50 93 5 P43 Green Aluminum 20 mm free Sector
1033 RD50 93 5 P43 Green Aluminum  
1036 RD50 93 5 P11 Blue Aluminum  
1018 RD50 100 5 P43 Green Aluminum  
1003 RD50 135 5 P43 Green Aluminum  
1016 RD50 135 5 P43 Green Aluminum Praseodym activated
               
1014 RD50 93 5 P43 Green ITO  
1025 RD50 93 5 P11 Blue ITO  
1024 RD50 135 5 P43 Green ITO