WINDING SPOOL, BONDING WIRE WOUND STRUCTURE AND SPOOL CASE FOR WINDING SPOOL

摘要

One objective of the present invention is to provide a winding spool for bonding wire and a spool case, which are free from winding collapse even when subject to a large impact during transit in cross-border, long-distance transportation. This winding spool for bonding wire is formed from synthetic resin and comprises a trunk section and flange sections, the trunk section having a guide hole coinciding with the central axis, and is characterized in that the elevation angle formed between the trunk section and each of the flange sections is between 77 degrees and 86 degrees (both inclusive) and, given that the bonding wire diameter is "1", the ratio of the trunk section winding width length to the bonding wire diameter is 50-550:1.