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Industry Directory | Manufacturer
One stop solution for SMT Machine WhatsApp:86-15931673319 HWGC SMT Manufacturer directly supply High speed / accuracy Pick and Place Machine 1 years Warranty Faetures: ✅High Accuracy ✅High Speed ✅Low Cost ✅Easy Programming ✅Mult
QFN stenicl bumping process demonstrated using a polyimide stencil. This process is one in which a stencil is used to the bump the bottom terminations of a leadless device making it simple to place without voiding of the the thermal pac or shorting o
Technical Library | 2022-12-19 18:59:51.0
Material and Process Characterization studies can be used to quantify the harmful effects that might arise from solder flux and other process residues left on external surfaces after soldering. Residues present on an electronic assembly can cause unwanted electrochemical reactions leading to intermittent performance and total failure. Components with terminations that extend underneath the package can trap flux residue. These bottom terminated components are flush with the bottom of the device and can have small solderable terminations located along the perimeter sides of the package. The clearance between power and ground render high electrical forces, which can propagate electrochemical interactions when exposed to atmospheric moisture (harsh environments). The purpose of this research is to predict and understand the functional performance of residues present under single row QFN component packages. The objective of the research study is to develop and collect a set of guidelines for understanding the relationship between ionic contamination and electrical performance of a BTC component when exposed to atmospheric moisture and the trade-offs between electrical, ionic contamination levels, and cleanliness. Utilizing the knowledge gained from undertaking the testing of QFN components and associated DOE, the team will establish a reference Test Suite and Test Spec for cleanliness.
Technical Library | 2019-08-07 22:56:45.0
The requirement to reconsider traditional soldering methods is becoming more relevant as the demand for bottom terminated components (QFN/BTC) increases. Thermal pads under said components are designed to enhance the thermal and electrical performance of the component and ultimately allow the component to run more efficiently. Additionally, low voiding is important in decreasing the current path of the circuit to maximize high speed and RF performances. The demand to develop smaller, more reliable, packages has seen voiding requirements decrease below 15 percent and in some instances, below 10 percent.Earlier work has demonstrated the use of micro-fluxed solder preforms as a mechanism to reduce voiding. The current work builds upon these results to focus on developing an engineered approach to void reduction in leadless components (QFN) through increasing understanding of how processing parameters and a use of custom designed micro-fluxed preforms interact. Leveraging the use of a micro-fluxed solder preform in conjunction with low voiding solder paste, stencil design, and application knowhow are critical factors in determining voiding in QFN packages. The study presented seeks to understand the vectors that can contribute to voiding such as PCB pad finish, reflow profile, reflow atmosphere, via configuration, and ultimately solder design.A collaboration between three companies consisting of solder materials supplier, a power semiconductor supplier, and an electronic assembly manufacturer worked together for an in-depth study into the effectiveness of solder preforms at reducing voiding under some of the most prevalent bottom terminated components packages. The effects of factors such as thermal pad size, finish on PCB, preform types, stencil design, reflow profile and atmosphere, have been evaluated using lead-free SAC305 low voiding solder paste and micro-fluxed preforms. Design and manufacturing rules developed from this work will be discussed.
BGA & QFN Inspection Made Easy! The new BGA Inspector is a standalone software tool capable of analyzing images from different radiography systems. The BGA Inspector is unique in its ability to quickly and easily producing the results you need to v
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New Equipment | Rework & Repair Services
BGA and QFN removal, replacement & re-balling services ECO rework services – jumper wires, etch cuts, etc. Component and Memory Upgrades Trace and Pad repair Revision Updates Quick-turn ECO rework capabilities
Events Calendar | Mon Oct 07 00:00:00 EDT 2019 - Tue Oct 08 00:00:00 EDT 2019 | ,
PCBA Cleanliness End-of-Project Webinar
Industry News | 2010-05-29 18:57:32.0
MARTIN will demonstrate the Reball/Prebump 03.1 unit at the upcoming SMTA Upper Midwest Expo, scheduled to take place Wednesday, June 9, 2010, at the Sheraton Bloomington Hotel in Bloomington, MN. This standalone unit is an easy and cost effective solution for BGA reballing and QFN solder bumping.
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