REED SWITCH GLASS TUBE

摘要

There is provided a reed switch glass tube (10) capable of preventing, for example, chipping and cracking of end parts (1) thereof by forming a compressive stress layer (22) having a length (A) from an end face (11) within a range of 0.1 mm to 0.6 mm on an outer circumference surface (12) of the end part (1) of the glass tube.