A reflow profile with a high ramp-up rate or a too-rapid temperature increase can lead to solder splattering and formation of solder balls. If the temperature increases too quickly, the flux may not ...

The wetting performances of these solder pastes on different substrates were studied under various reflow profiles. The test results of solder ball, slump and printing properties indicate that with a ...

The experiments were carried out with a different ratio between the standard and low-temperature pastes. It was measured whether changing the amount of bismuth in the solder paste changed the amount ...

这是一个使用ML.NET 3.0进行PCB（印刷电路板）缺陷检测的深度学习项目。项目采用ImageClassification训练器和ResNet架构 ...

It’s easy to copy and paste text messages on Android, and below we’ll walk you through how to do this using Google Messages, as well as what to do if you have a Samsung phone. How to copy and ...

Topological defects are quasiparticles whose topological nature provides some stability against perturbations. Skyrmions, domain walls, dislocations in crystals, vortices in superconductors and ...

YouTube has as deep a selection of new movies as anyone, as long as you’re willing to pay to stream. But the video streaming service also has a great, if hard-to-find, selection of legal free ...

A past statement credited to Senate President Godswill Akpabio has resurfaced online amid a wave of defections currently rocking the Nigerian Senate. The statement, believed to be from November ...