Japan will restrict the export to South Korea of key chemicals used in the production of electronics, reports Japanese newspaper Sankei. This comes after a South Korea's Supreme Court ruled last year that Koreans have not been properly compensated by Japanese companies for the forced labor during World War II. The materials in question are fluorinated polyimide (used in smartphone and TV displays), resist (used when soldering chips to PCBs) and high-purity hydrogen fluoride (used in etching semiconductors). Japan produces 90% of the world's fluorinated polyimide and 70% of the resist,...