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)
Technical Library | 2023-01-17 17:58:36.0
Heterogeneous integration has become an important performance enabler as high-performance computing (HPC) demands continue to rise. The focus to enable heterogeneous integration scaling is to push interconnect density limit with increased bandwidth and improved power efficiency. Many different advanced packaging architectures have been deployed to increase I/O wire / area density for higher data bandwidth requirements, and to enable more effective die disaggregation. Embedded Multi-die Interconnect Bridge (EMIB) technology is an advanced, cost-effective approach to in-package high density interconnect of heterogeneous chips, providing high density I/O, and controlled electrical interconnect paths between multiple dice in a package. In emerging architectures, it is required to scale down the EMIB die bump pitch in order to further increase the die-to-die (D2D) communication bandwidth. Aa a result, bump pitch scaling poses significant challenges in the plated solder bump reflow process, e.g., bump height / coplanarity control, solder wicking control, and bump void control. It's crucial to ensure a high-quality solder bump reflow process to meet the final product reliability requirements. In this paper, a combined formic acid based fluxless and vacuum assisted reflow process is developed for fine pitch plated solder bumping application. A high-volume production (HVM) ready tool has been developed for this process.
Industry News | 2013-08-15 20:58:22.0
Heller Industries announced today that they have entered into a joint development agreement with International Business Machines Corporation (NYSE: IBM), to collaborate on the development of fluxless mass reflow furnace equipment and process for high volume manufacturing. The fluxless process utilizes gas phase formic acid to replace standard fluxing agents, and eliminates the need for pre-reflow fluxing and post-reflow flux cleanup steps.
Industry News | 2021-11-08 14:38:39.0
Heller Industries, a leading supplier of reflow soldering ovens for electronic manufacturing and pressure curing ovens for back-end semicondutor manufacturing, today announced they will be exhibiting their new MK7 reflow oven at the San Diego Conference Center January 25-27, 2022.
Industry News | 2023-06-12 21:13:08.0
HELLER joined the 97th CEIA China Electronics Intelligent Manufacturing Summit Forum convened in Wuhan, garnering substantial attention from industry insiders. The conference concentrated on a wide array of fields, including optoelectronic communication, military electronics, and EV automotive electronics. With an impressive turnout of nearly 500 industry colleagues, the event proved to be an invaluable platform for networking and knowledge exchange.
Industry News | 2023-06-12 21:14:11.0
The 2023 Beijing Intelligent Manufacturing and SMT Technology Exchange Conference, hosted by the Intelligent Manufacturing Committee of the Beijing Electronics Society, was successfully held in Beijing on May 25th. HELLER was honored to be invited and actively participated by sharing their cutting-edge technology and expertise.
Industry News | 2024-06-06 21:18:44.0
Heller Industries announced two hirings today to strengthen their market position in the Eastern United States. Bob Doetzer, President of Circuit Technology Inc., has been appointed sales representative for North and South Carolina. Circuit Technology is a manufacturer's representative and IPC training group specializing in products and services covering circuit board production and semiconductor assembly.
Industry News | 2009-02-02 18:48:47.0
Henkel today announced the appointment of Mr. Luc Godefroid as the company's Global Sales Director for its Semiconductor Group. A key member of Henkel's electronics sales team since 2001, Godefroid's new role sees him building on his previous success and directing the global sales efforts of Henkel's worldwide team and expanded product portfolio.
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.
