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SHENMAO Technology to Present on No Clean Flux in Fine-pitch Flip Chip Interconnect at IWLPC 2016
October 11, 2016 | SHENMAO America Inc.Estimated reading time: Less than a minute
For several years, an approach to use fine-pitch flip chip package (<150um) with copper pillar/ micro-bump is for the realization of 2.5D/3D packages of higher density and performance enhancement. Generally, flux is widely used to clean the surfaces to be soldered for good wetting and form reliable joints. The upcoming concerns about fluxes are clean-ability for fine-pitch package, voiding and compatibility with underfill materials. There is a tradeoff between flux characteristics and soldering performance.
At the upcoming 13th International Wafer Level Packaging Conference (IWLPC), SHENMAO Technology Inc. will present a paper on a formulated no clean flux for fine-pitch flip chip package of copper pillar/micro-bump interconnect. This paper will discuss in details about the applicability of a new no clean flux in fine-pitch flip chip interconnect from the point of view of flux formulations, including flux activity for wetting performance, rheological characterization for the study of behaviors during reflow process and the evaluation of compatibility with underfill.
Authored by Hsiang-Chuan Chen, Ya-Ching Chuang, Chia-Hao Chang, and Watson Tseng, the paper will be presented during the Interactive Presentations session on October 18, 10:00 am to 1:30 pm.
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The Chemical Connection: Reducing Etch System Water Usage, Part 2
05/02/2024 | Don Ball -- Column: The Chemical ConnectionIn my last column, I reviewed some relatively simple ways to reduce water usage in existing etch systems: cutting down cooling coil water flow, adding chillers to replace plant water for cooling, lowering flow rate nozzles for rinses, etc. This month, I’ll continue with more ways to control water usage in your etcher. Most of these are not easily retrofittable to existing equipment but should be given serious consideration when new equipment is contemplated. With the right combination of add-ons, it is possible to bring the amount of water used in an etch system to almost zero.
Designer’s Notebook: What Designers Need to Know About Manufacturing, Part 2
04/24/2024 | Vern Solberg -- Column: Designer's NotebookThe printed circuit board (PCB) is the primary base element for providing the interconnect platform for mounting and electrically joining electronic components. When assessing PCB design complexity, first consider the component area and board area ratio. If the surface area for the component interface is restricted, it may justify adopting multilayer or multilayer sequential buildup (SBU) PCB fabrication to enable a more efficient sub-surface circuit interconnect.
Insulectro’s 'Storekeepers' Extend Their Welcome to Technology Village at IPC APEX EXPO
04/03/2024 | InsulectroInsulectro, the largest distributor of materials for use in the manufacture of PCBs and printed electronics, welcomes attendees to its TECHNOLOGY VILLAGE during this year’s IPC APEX EXPO at the Anaheim Convention Center, April 9-11, 2024.
ENNOVI Introduces a New Flexible Circuit Production Process for Low Voltage Connectivity in EV Battery Cell Contacting Systems
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Heavy Copper PCBs: Bridging the Gap Between Design and Fabrication, Part 1
04/01/2024 | Yash Sutariya, Saturn Electronics ServicesThey call me Sparky. This is due to my talent for getting shocked by a variety of voltages and because I cannot seem to keep my hands out of power control cabinets. While I do not have the time to throw the knife switch to the off position, that doesn’t stop me from sticking screwdrivers into the fuse boxes. In all honesty, I’m lucky to be alive. Fortunately, I also have a talent for building high-voltage heavy copper circuit boards. Since this is where I spend most of my time, I can guide you through some potential design for manufacturability (DFM) hazards you may encounter with heavy copper design.