JEDEC phosphors

The various cathode-ray phosphors have been classified over the years 

P-3 Zn2BeSi04 Mn green-yellow medium(20ms) oscilloscope 

P-7 ZnS Ag -i-ZnCdS2 Cu blue -1- yellow medium(57usec) long (400 ms) radar 

P-10 KChVci dark trace very long electrochrome 

P-13 MgSiOs Mn red- orange med long (52ms) military radar 

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Sinee high resolution is required for these screens, they must be extremely uniform in phosphor particle size. That is, the PSD must be ncirrow in size and no more than 6-8 n in average size. You will note that these devices still employ the old JEDEC phosphors. More recently, the... 

Phosphors for CRTs are predominantly based on zinc and cadmium sulfides. Selected CRT phosphors are listed in Table 1 which also includes their precursors, their P-numbers , and their uses. (The system used to classify CRT phosphors came from JEDEC, the former Joint Electronic Device Engineering Council, now JT- Committee on Phosphor and Optical Characteristics within the Electronic Industries Association. JEDEC established the original code for these phosphors in terms of P-numbers .8 Many manufacturers of CRTs use these when specifying phosphor screen characteristics.) Although the precursors are tabulated, the mole ratios used in the syntheses are not. 

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