Technical Library | 2023-01-17 17:37:45.0
Various international market trends drive electronics manufacturers and their mate- rials and equipment suppliers to develop new assembly techniques to reduce the industry's environmental impact. Two pri- mary forces in this drive are the movements to lead-free assembly and ISO 14000 cer- tification. In response to these factors, reflow technology advances are enabling manufacturers to meet or anticipate the new environmental mandates.
Technical Library | 2023-01-17 17:19:44.0
A test program was developed to evaluate the effectiveness of vacuum reflow processing on solder joint voiding and subsequent thermal cycling performance. Area array package test vehicles were assembled using conventional reflow processing and a solder paste that generated substantial void content in the solder joints. Half of the population of test vehicles then were re-processed (reflowed) using vacuum reflow. Transmission x-ray inspection showed a significant reduction in solder voiding after vacuum processing. The solder attachment reliability of the conventional and vacuum reflowed test vehicles was characterized and compared using two different accelerated thermal cycling profiles. The thermal cycling results are discussed in terms of the general impact of voiding on solder thermal fatigue reliability, results from the open literature, and the evolving industry standards for solder voiding. Recommendations are made for further work based on other void reduction methods and additional reliability studies.
Technical Library | 2023-01-17 17:27:13.0
Reflow profile has significant impact on solder joint performance because it influences wetting and microstructure of the solder joint. The degree of wetting, the microstructure (in particular the intermetallic layer), and the inherent strength of the solder all factor into the reliability of the solder joint. This paper presents experimental results on the effect of reflow profile on both 63%Sn 37%Pb (SnPb) and 96.5%Sn 3.0%Ag 0.5%Cu (SAC 305) solder joint shear force. Specifically, the effect of the reflow peak temperature and time above solder liquidus temperature are studied. Nine reflow profiles for SAC 305 and nine reflow profiles for SnPb have been developed with three levels of peak temperature (230 o C, 240 o C, and 250 o C for SAC 305; and 195 o C, 205 o C, and 215 o C for SnPb) and three levels of time above solder liquidus temperature (30 sec., 60 sec., and 90 sec.). The shear force data of four different sizes of chip resistors (1206, 0805, 0603, and 0402) are compared across the different profiles. The shear force of the resistors is measured at time 0 (right after assembly). The fracture surfaces have been studied using a scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS)
Industry News | 2015-11-12 22:03:28.0
Heller Industries is thrilled to announce that we've partnered with the #1 Northern California Sales Representative Group - Lean-Stream!
Industry News | 2014-09-06 19:18:17.0
Briefing Co-hosted by IPC as Part of Continuing Effort to Connect IPC Members with Policymakers.
Industry News | 2019-12-09 14:44:26.0
The SMT Reflow Soldering Equipment (Global) award was awarded to Heller Industries by Frost & Sullivan.
Industry News | 2016-05-10 14:16:16.0
GPD Global offers individual pumps for integration into your existing platform – the Jetting NCM5000 Pump is one of them. The Jetting NCM5000 Pump simplifies jetting to its basic elements: hammer, pin, and nozzle. Only the pin and nozzle are wetted parts. This means easy set-up, cleaning, and upkeep.
Training Courses | | | IPC-7711/7721 Specialist (CIS)
The Certified IPC-7711/7721 Specialist (CIS) training focuses on rework of electronic assemblies and repair and modification of printed boards and electronic assemblies.
New Equipment | Education/Training
Blackfox’s Lead Free Soldering series minimizes the risks of conversion, and gives you the confidence to introduce lead free products and services quickly, with highest quality. The lead free certification program offers the latest requirements for S
Training Courses | | | IPC-7711/7721 Trainer (CIT)
The Certified IPC-7711/7721 Trainer (CIT) courses recognize individuals as qualified trainers in the area of rework and repair of printed boards and electronic assemblies and prepares them to deliver Certified IPC-7711/7721 (CIS) training.
