Technical Library | 2020-05-08 18:22:31.0
A customer contacted the Helpline to perform analysis on a lead-free assembly which exhibited intermittent functionality. The lead-free assembly exhibiting intermittent functionality when pressure was applied to the ball grid array (BGA) packages. Industrial adaptation of a Restriction of Hazardous Substances (RoHS) compliant solder standard has created a new host of failure modes observed in lead-free assemblies. Pad cratering occurs when fractures propagate along the epoxy resin layer on the underside of the BGA connecting pads. While originating from process, design, and end use conditions, it is the combination of a rigid lead-free solder with inflexible printed circuit board (PCB) laminates that has advanced the prevalence of this condition. Pad cratering is simply the result of mechanical stress exceeding material limitations.
Industry News | 2011-03-31 11:54:23.0
Over the past few years, pad cratering has become a vexing problem in lead-free assemblies, largely attributed to problems with the resin used to make a printed board. To help industry eliminate the defect and, at the same time, cut costs, IPC — Association Connecting Electronics Industries® has released IPC-9708, Test Methods for Characterization of PCB Pad Cratering.
Industry News | 2011-12-14 15:35:33.0
Manufacturing processes, handling and printed circuit assembly (PCA) test can put a lot of mechanical stresses on packages, causing failures. As grid array packages get larger, identifying how to set safe levels for these steps becomes more difficult. A new quantitative test methodology within IPC/JEDEC-9707, Spherical Bend Test Method for Characterization of Board Level Interconnects, lets users determine how much strain packages can take before reliability degradation.
PCB Surface Cleaning Machine MLPCM-450 Technical Parameters 1. Independent innovation patent design (patent: 2017SR471774), the industry's first, lets you have the most advanced contact cleaning system in the industry. 2. Using Panasonic PLC program
New Equipment | Coating Equipment
select coat conformal coating machine AC-CF450 model is ideal for selective conformal coating and dispensing applications that require a high level of accuracy and repeatability. It includes standard AC-CF450 model selective cost
New Equipment | Coating Equipment
Conformal coating can be applied over the entire PCB surface or in select areas to provide protection from service environments.Materials are available for tin whisker mitigation, humid environments, and shadow areas.Selecting Coating Machi
New Equipment | Coating Equipment
Automated PCB Surface coating equipment is designed for the smart, automatic, selective coating of conformal coating material. ASCEN designs and manufacturers PCB Surface coating machine for the printed circuit board industry
New Equipment | Cleaning Equipment
PCB Surface Cleaning Machine MLPCM-450 Technical Parameters 1. Independent innovation patent design (patent: 2017SR471774), the industry's first, lets you have the most advanced contact cleaning system in the industry. 2. Using Panasonic PLC program
https://www.ascen.ltd/Products/conformal_coating_equipment//579.html PCB conformal coating machine selective coating process for PCBA, PCB coating machine protective coating,to protect the sensitive components: from external environmental factors,vib
https://www.ascen.ltd/Products/conformal_coating_equipment//580.html PCB Conformal coating machine is used to paint conformal coating onto full LED panel to avoid PCB moisture,sault and static.It can be full panel conformal coating or selective coati
