选择性焊接

Spray Fluxing is the most common way to flux a printed circuit board today. When spray fluxers were first developed they were clumsy, inefficient machines. They were messy and required a lot of

Calculating the exact amount of solder paste needed for a given circuit board or for a full production run can be difficult for several reasons, including: print deposit variations paste left on the

虽然我们很少收到关于水洗型/水溶性助焊剂或焊膏的SIR 表面绝缘电阻）和/或ECM（电化学迁移）测试结果的请求，但这类请求的频率也足够高，以至于

Folks, Patty and Rob return from their honeymoon……. Patty had just finished some emails and was ready to head off to meet Rob and some of their buddies for

Shelf life of solder is a concern that is raised by customers on a somewhat regular basis. Solder pastes typically have a well defined shelf life, however the useable life of a solid form of solder

A colleague in California was on the phone last week: "We need a flux with greater activity!" He said. Choking down comments like "Maybe we can take it jogging next time you're in

Folks, In teaching process optimization and failure analysis, one of the most helpful concepts is understanding he difference between common cause and special cause defects. A special cause defect,

Figure 1: Solderspatter (soldersplash) on Gold/Nickel Figure 2: Phase Inversion during Reflow Most people are aware that solder paste is a mixture of solder powder and a flux

Folks, I was recently asked to give a presentation and audit an assembly line regarding minimizing "tombstoning" of passives at a major electronic