Knowledge Center

Dielectric withstand (hipot) testing is a mandatory safety and reliability verification for printed circuit boards (PCBs). It assesses the insulation integrity between conductive traces, layers, and vias under high voltage, preventing electrical breakdow...

Solder paste is the core material in SMT assembly, and its printability, wettability, viscosity stability, and solderability directly determine printing quality, reflow defect rate, and final assembly reliability. When switching to same-specification solde...

Component polarity reversal (also known as reverse polarity, wrong orientation) is one of the most frequent and high-risk defects in SMT placement. It causes electrical failure, functional abnormality, and batch scrapping, seriously reducing production yie...

Selective soldering is widely used in through-hole component soldering of high‑precision circuit boards, especially in automotive electronics, industrial control and medical equipment. However, due to its localized high‑temperature jet characteristics,...

In modern electronic manufacturing, Automated Optical Inspection (AOI) has become an indispensable quality control tool for printed circuit boards (PCBs), semiconductor packaging, and component assembly. AOI detects defects such as missing components, tomb...

In the manufacturing of high-density interconnect (HDI) printed circuit boards, IC substrates, and automotive electronic modules, through-hole plating with a high aspect ratio (AR > 8:1) is a critical process that directly determines the electrical conduct...

Ceramic–glass composite substrates are widely used in high‑frequency PCBs, semiconductor packaging, and optoelectronic devices owing to their low dielectric loss, high thermal conductivity, and good mechanical stability. However, their mixed brittl...

Voiding after BGA (Ball Grid Array) underfill encapsulation is a critical defect that severely reduces thermal cycling reliability, drop resistance and long-term stability of electronic assemblies. This paper systematically analyzes three dominant causes: ...

Copper clad laminates (CCL) are critical base materials for printed circuit boards (PCBs). Resin flow control during lamination is a key factor determining PCB bonding strength, dielectric stability, thickness uniformity, and defect-free rate. Improper s...

Ceramic substrates (Al₂O₃, AlN, Si₃N₄, LTCC) are widely used in high‑end power electronics, radio‑frequency devices, and semiconductor packaging due to their excellent thermal conductivity, electrical insulation, and high‑temperature stabilit...