SEOUL, May 19 : South Korean memory chip maker Samsung Electronics is facing its worst-ever strike, with nearly 48,000 workers threatening to walk off production lines on Thursday for 18 days over a dispute about bonus payouts. Here are key things to know:WHAT DOES SAMSUNG'S UNION WANT?Samsung's

South Korea's PM warned of "unimaginable" economic damage. The union wants 15% of operating profit. Samsung has offered 10%. The deadline is May 21.

Samsung Electronics and its South Korean labour union will resume government-mediated pay talks on Monday in an effort to avoid a strike planned for Thursday. The talks come after…

While crisis has put South Korea on edge, government threatened to order arbitration

Samsung Electronics management and its labour union resumed negotiations on Wednesday ahead of a threatened 18-day strike by nearly 48,000 workers starting Thursday.