Industry Directory | Consultant / Service Provider / Manufacturer / Other
Taiwan Dry Tech Corp. manufacturer of Eureka Dry Tech Fast Super Dryers for moisture/humidity proof protective storage of PCB, MSD, IC packages, meets IPC/JEDEC J-STD-033 & IPC-1601.
Industry Directory | Consultant / Service Provider / Manufacturer
Eureka Dry Tech's IPC/JEDEC J-Std-033c Ultra Low Humidity Dry Cabinets provides moisture/humidity controlled storage of MSD，PCB, IC packages. Drying technology trusted by millions in replacing baking, nitrogen & desiccant packs.
170 oC) Phenolic cured (Dicy Free) system with inorganic filler High Td (decomposition temp. > 340 oC by TGA) Lead free process compatible (260 oC IR reflow 6x + 288 oC solder flow 3x, no delamination) Low Coefficient of Thermal Expansion ( 60 min. T
170 oC) Phenolic cured (Dicy Free) system with inorganic filler High Td (decomposition temp. > 340 oC by TGA) Lead free process compatible (260 oC IR reflow 6x + 288 oC solder flow 3x, no delamination) Low Coefficient of Thermal Expansion ( 60 min. T
Electronics Forum | Mon Feb 05 17:18:53 EST 2001 | davef
Wha, Nellie!!! Delamination & Blistering IPC-A-600D Although it may occasionally occur because of a severe process breakdown, delamination and blistering occurs as a result of an inherent weakness of the material. Either condition represents a brea
Electronics Forum | Thu Nov 16 11:45:15 EST 2006 | markb
I still think the best bet is probably an SMT pre-bake operation to ensure that there is no moisture in the board. Vapor pressure is usually the leading cause for delamination, so removing the source should significantly help out. Unfortuantely, pr
Industry News | 2018-12-08 03:29:29.0
SMT Dictionary – Surface Mount Technology Acronym and Abbreviation
Technical Library | 2019-05-01 23:18:27.0
Moisture can accelerate various failure mechanisms in printed circuit board assemblies. Moisture can be initially present in the epoxy glass prepreg, absorbed during the wet processes in printed circuit board manufacturing, or diffuse into the printed circuit board during storage. Moisture can reside in the resin, resin/glass interfaces, and micro-cracks or voids due to defects. Higher reflow temperatures associated with lead-free processing increase the vapor pressure, which can lead to higher amounts of moisture uptake compared to eutectic tin-lead reflow processes. In addition to cohesive or adhesive failures within the printed circuit board that lead to cracking and delamination, moisture can also lead to the creation of low impedance paths due to metal migration, interfacial degradation resulting in conductive filament formation, and changes in dimensional stability. Studies have shown that moisture can also reduce the glass-transition temperature and increase the dielectric constant, leading to a reduction in circuit switching speeds and an increase in propagation delay times. This paper provides an overview of printed circuit board fabrication, followed by a brief discussion of moisture diffusion processes, governing models, and dependent variables. We then present guidelines for printed circuit board handling and storage during various stages of production and fabrication so as to mitigate moisture-induced failures.
