Hãng Weller sang thăm EMIN Việt Nam

A plated through-hole (PTH) in a multilayer circuit board features a copper-plated barrel extending through the internal circuit layers; it is not merely an empty hole connecting the top and bottom layers

Through-beam sensors require two units positioned on opposite sides of the object, perfectly aligned. Many automated production lines feature mechanical gaps of only a few millimeters, leaving insufficient space for both units. In contrast, diffuse-reflective fiber-optic sensors integrate both the light emitter and receiver into a single sensing head, requiring access from only one side

A stereo microscope is suitable for visual inspection, 3D surfaces, and applications that require direct manipulation of the specimen. A metallurgical microscope is better suited to flat, prepared metal samples and applications that require high-magnification analysis of microstructures.

A practical overview of the setup and test sequence for the Vertical Combustibility Tester GT-C35B when evaluating vertically oriented materials.

Kiểm tra PCB bằng kính hiển vi không đơn giản là chọn mức phóng đại càng lớn càng tốt. Khi phóng đại tăng, trường nhìn thu hẹp và vùng quan sát thay đổi. Với công việc sửa chữa, người dùng còn cần khoảng trống đủ lớn để đưa mỏ hàn, nhíp hoặc dụng cụ vào dưới vật kính.