PCB jumper reflow: conveyor transit time is not time above liquidus
A conveyor-speed change alters fixed-distance transit time, but does not directly determine jumper solder-joint TAL or p...
Guide | Technical Guides & Company Updates — Page 4
Explore Hongchuan Metals technical guides, product information and company updates. Review PCB busbar, solder terminal and SMT nut selection considerations alongside the product catalog.
SMT nut magnet tests: magnetic response is not a material grade
Use magnetic response as a screening observation, not a stainless-grade verdict. Check material identity and processing ...
PCB busbar hole position: diametrical tolerance versus X/Y offsets
Compare independent X/Y limits with a diametrical position zone using a simple 2D example, while keeping datum alignment...
PCB busbar thermal properties: diffusivity versus conductivity
Distinguish thermal diffusivity in mm²/s from conductivity in W/(m·K), check density and heat-capacity units, and keep m...
PCB solder terminals: investigating copper dissolution and solder-bath analysis
Investigate suspected copper loss in PCB solder terminals using matched geometry evidence, solder contact history and ba...
Surface mount PCB jumpers: what 30 zero-failure samples say about pass probability
Calculate an exact one-sided 95% binomial lower confidence bound after zero failures. Learn why sample pass rate, popula...
SMT nut and stainless screw seizure: investigating galling versus thread mismatch
A screw that jams before seating needs investigation, not more torque. Check material pairing, thread identity and conta...
PCB busbar finished dimensions: plating build-up, thickness and hole diameter
Separate base-metal and finished PCB busbar dimensions. Worked ideal examples explain two-face plating build-up, bore re...
PCB copper busbar dimensions: 20°C reference temperature and length correction
How to compare a PCB copper busbar measured away from 20°C with its drawing: a worked thermal-expansion example, correct...
PCB Solder Terminal Process Review: Tg, Td, T260 and T288
Distinguish laminate glass transition, decomposition and time-to-delamination data. Check methods and specimen condition...
Surface Mount PCB Jumpers: Component Records vs IPC Assembly Acceptance
Separate jumper component records, soldering process requirements and assembly acceptance. Define document revision, cla...
SMT Nut Torque Tools: Full-Scale vs Indicated-Value Accuracy
Compare full-scale and indicated-value error with a hypothetical example, then check valid range, resolution and calibra...