Electronics Forum | Fri Apr 03 08:22:36 EST 1998 | Scott Cook
| At this moment in time we are using water soluble solder paste on our PCBs these are cleaned using water only, agitated with ultrasonics. After drying a white/grey residue is left around solder joints. Reflow profile is fine and a reliable wash pro
Electronics Forum | Thu Jan 02 11:35:30 EST 2003 | Richard
Cleanliness test � �Area Grid Arrays�. Evaluation of residues� resistivity in a specific location on the board. (As compared to �Solvent Extract� evaluation.) We are: SMT assembly, using standard �water soluble� process with micro BGAs (example: C
Industry News | 2003-06-26 09:02:38.0
The surface quality of printed circuit boards and components directly impacts performance and product life.
Industry News | 2022-10-12 11:23:36.0
In the SMT industry, there are many types of cleaning machines. According to the cleaning things, there are stencil cleaner, PCBA cleaner, Wave Oven Pallet/Fixture cleaner, Mis-Print PCB cleaner, Squeegee cleaner, Nozzle cleaner, PCB surface cleaner and so on.
Technical Library | 2018-11-20 21:33:57.0
There are several industry-accepted methods for determining the reliability of flux residues after assembly. The recommended methods of test sample preparation do not always closely mimic the thermal cycle experienced by an assembly. Therefore, extraction from actual assemblies has become a popular method of process control to assess consistency of post-reflow cleanliness. Every method of post-reflow flux residue characterization will depend on the reflow process followed to prepare the coupon.This investigation will focus on the effect of thermal conditions on the remainder of active ingredients in flux residues after assembly with no-clean solder pastes.
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.
Training Courses | ONLINE | | PCB Assembly Courses
The PCB assembly courses provide knowledge of different processes and equipment used in TH and SMT assembly of printed circuit boards.
Events Calendar | Mon May 10 00:00:00 EDT 2021 - Mon May 10 00:00:00 EDT 2021 | ,
Europe Chapter Webinar: Manual Cleaning of Printed Board Assemblies – Step by Step Guide
Events Calendar | Wed Apr 21 00:00:00 EDT 2021 - Wed Apr 21 00:00:00 EDT 2021 | ,
Oregon Chapter Tutorial: How Clean is Clean and How Do You Know for Sure?
SMTnet Express, November 21, 2018, Subscribers: 31,479, Companies: 11,087, Users: 25,424 Understanding the Effect of Different Heating Cycles on Post-Soldering Flux Residues and the Impact on Electrical Performance Brook Sandy-Smith, Indium
Surface Mount Technology Association (SMTA) | https://www.smta.org/chapters/chapters_detail.cfm?chapter_id=38
for qualifying, optimizing and monitoring cleanliness Passed and Failed test coupons 3:00pm Claire Hotvedt , Indium Corporation Title: Consumer Electronics Industry Trends Biography: Claire Hotvedt is a Product Development Specialist for the PCB
| https://www.eptac.com/wp-content/uploads/2015/03/ecss_q_st_70_18c-space-product-assurance-rf-coax-cables.pdf
5.1 Preparatory conditions .............................................................................................13 5.1.1 Facility cleanliness......................................................................................13
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