Europe Puts Tariffs on Seoul Chip Maker
European Commission imposes 33 percent tariff on memory chips produced by South Korea's Hynix Semiconductor; charges near-bankrupt company received 'enormous subsidies' from 'government-owned or controlled South Korean banks'; says subsidies, acting on complaint of Infineon Technologies of Germany, had 'highly negative impact' on European semiconductor industry, forcing European manufacturers to suffer average loss of 96 percent on memory chips; commission's decision comes as severe blow to Hynix, already battered by preliminary decision by US Commerce Department on April 1 to impose 57 percent tariff in response to complaint by Micron Technology; European and American decisions call into question policy of Hynix's creditors, led by Korea Exchange Bank, to guarantee company's survival; photo (M)