METHOD FOR HEAT TREATING PLASTIC SUBSTRATE

• Main Authors: ISHIKAWA TOMOTAKA, SUZUKI KENSAKU
• Format: Patent
• Language: English
• Published: 14.10.2003
• Edition: 7
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PERFORMING OPERATIONS; PHYSICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To provide a method for heat treating a substrate which does not cause warp or distortion by heating. SOLUTION: The method for heat treating a plastic substrate by putting a plastic sheet 6 in between the plastic substrate 5 and a flat base 7 to place the plastic substrate, which is characterized in that a relational expression T0<T1<T2 applies among T0: heat conductivity of the plastic substrate, T1: heat conductivity of the plastic sheet and T2: heat conductivity of the upper surface of the flat base. COPYRIGHT: (C)2004,JPO