Soldering sheets using soft solders

Lead-Free Soldering and Low Alpha Solders for Wafer Level Interconnects

Lead-free soldering, originally started as an environmental issue, is evolving rapidly into a business survival tool for the worldwide electronic industry. Promising lead-free solder alternatives for surface mount assembly applications include eutectic Sn/Ag, eutectic Sn/Cu, Sn95/Sb5, eutectic Sn/Bi, Sn/Ag/Cu, Sn/Ag/Cu/X, Sn/Bi/Ag/X, Sn/Zn/X, and Sn/In/Ag/(X). However, for wafer level area arra...

Soft Error Issue and Importance of Low Alpha Solders for Microelectronics Packaging

To satisfy the ever-increasing demand for higher density (functionality) and lower power (portability), the dimensions and operating voltages of the modern electronic devices are being reduced frequently. This has brought new challenges both from the technology and materials point of view. One such issue is soft error, the temporary malfunction of device caused by the effect of radiation on the...

Laser Soldering of Rat Skin Using a Controlled Feedback System

Introduction: Laser tissue soldering using albumin and indocyanine green dye (ICG) is an effective technique utilized in various surgical procedures. The purpose of this study was to perform laser soldering of rat skin under a feedback control system and compare the results with those obtained using standard sutures. Material and Methods: Skin incisions were made over eight rats’ dorsa, which w...

Compression and aggregation-resistant particles of crumpled soft sheets.

Unlike flat sheets, crumpled paper balls have both high free volume and high compressive strength, and can tightly pack without significantly reducing the area of accessible surface. Such properties would be highly desirable for sheet-like materials such as graphene, since they tend to aggregate in solution and restack in the solid state, making their properties highly dependent on the material...

Ersa wave soldering systems