Abstract: An assembly comprises a component of a plasma process chamber, a thermal source and a polymer composite therebetween exhibiting a phase transition between a high-thermal conductivity phase and a low-thermal conductivity phase. The temperature-induced phase change polymer can be used to maintain the temperature of the component at a high or low temperature during multi-step plasma etching processes.

Abstract: An assembly comprises a component of a plasma process chamber, a thermal source and a polymer composite therebetween exhibiting a phase transition between a high-thermal conductivity phase and a low-thermal conductivity phase. The temperature-induced phase change polymer can be used to maintain the temperature of the component at a high or low temperature during multi-step plasma etching processes.

Abstract: The invention relates to a crosslinkable polymer for use in optics and non-linear optics, which comprises at least one chromophore, characterized in that it has, on at least two of its ends, at least one reactive end group of a different chemical type from the group predominantly used in polymerization and the preparation of a polymer skeleton. Said reactive end group comprises at least one CC, CN, CS, SS or NS double bond and/or triple bond, and/or an epoxy group and/or a thiol group or a derivative of said groups, and the polymerization groups are selected from at least one of the following groups: urethane, ester, amide, imide, ether, carbon-carbon, sulfide, silane and siloxane, urethane and ester groups being particularly preferred. Application in optical and opto-electronic materials and devices.

Abstract: The present invention relates to a new polyesterimide of the type containing ester repeat functional groups E=--CO--O--, imide repeat functional groups I: ##STR1## and at least one chromophore, characterized in that it contains a quantity of recurrent amide functional groups capable of ring closure to imides which is smaller than or equal to 5 mol % relative to the sum of the imide functional groups and of the amide functional groups capable of ring closure to imides, which are present, and in that the polymerization functional groups consist essentially of E functional groups.This polyesterimide is preferably free from amide functional groups capable of ring closure to imides.One of the processes for obtaining this polyesterimide constitutes another subject-matter of the invention.Such a polymer is advantageously capable of behaving like a material that is transparent and/or active in nonlinear optics.