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High Atomic Number Recording Material

IP.com Disclosure Number: IPCOM000093433D
Original Publication Date: 1967-Sep-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Chang, LS: AUTHOR

Abstract

One readout technique for a thermoplastic recording material in a thermoplastic recording system comprises detecting backscattered electrons. By substituting a thermoplastic recording polymer with atoms of high atomic number such as a halogen, the backscattered electron signal is greatly enhanced. Examples of halo substituted thermoplastic polymers are as follows: STC where X is a halogen, such as chlorine, bromine, and iodine, and n is the number of repeating units, and STC (Image Omitted) where X and n are the same as above.

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High Atomic Number Recording Material

One readout technique for a thermoplastic recording material in a thermoplastic recording system comprises detecting backscattered electrons. By substituting a thermoplastic recording polymer with atoms of high atomic number such as a halogen, the backscattered electron signal is greatly enhanced. Examples of halo substituted thermoplastic polymers are as follows: STC where X is a halogen, such as chlorine, bromine, and iodine, and n is the number of repeating units, and STC

(Image Omitted)

where X and n are the same as above.

Specific examples of thermoplastic recording materials with atoms of high atomic number are polybromohexaphenyl ether, a composition of 80% polybromohexaphenyl ether and 20% by weight of styrene-decylemethacrylate copolymer (85/15), and a composition of 80% of polybromohexaphenyl ether and 20% by weight of styrene-decylemethacrylate-hydroxyethylmethacrylate terpolymer (75/20/5).

The substitution of a high atomic number atom increases the electron density of the thermoplastic film and, hence, enables an increase in the backscattered electron signal.

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