23 pcb buyer/distributor/trading company/commercial company in canada results

Industry News: pcb buyer/distributor/trading company/commercial company in canada (21)

The PCB Industry Loses Pioneer in Ken Armitage

Industry News | 2003-02-05 08:17:11.0

Ken was the President and Owner of Lazer-Tech

SMTnet

North American PCB Business Rebounded in June

Industry News | 2015-08-10 17:07:47.0

IPC announced the June findings from its monthly North American Printed Circuit Board (PCB) Statistical Program. Sales and orders were up and the book-to-bill ratio strengthened to 1.06.

Association Connecting Electronics Industries (IPC)

Technical Library: pcb buyer/distributor/trading company/commercial company in canada (2)

Solder Joint Reliability of Pb-free Sn-Ag-Cu Ball Grid Array (BGA) Components in Sn-Pb Assembly Process

Technical Library | 2020-10-27 02:07:31.0

For companies that choose to take the Pb-free exemption under the European Union's RoHS Directive and continue to manufacture tin-lead (Sn-Pb) electronic products, there is a growing concern about the lack of Sn-Pb ball grid array (BGA) components. Many companies are compelled to use the Pb-free Sn-Ag-Cu (SAC) BGA components in a Sn-Pb process, for which the assembly process and solder joint reliability have not yet been fully characterized. A careful experimental investigation was undertaken to evaluate the reliability of solder joints of SAC BGA components formed using Sn-Pb solder paste. This evaluation specifically looked at the impact of package size, solder ball volume, printed circuit board (PCB) surface finish, time above liquidus and peak temperature on reliability. Four different BGA package sizes (ranging from 8 to 45 mm2) were selected with ball-to-ball pitch size ranging from 0.5mm to 1.27mm. Two different PCB finishes were used: electroless nickel immersion gold (ENIG) and organic solderability preservative (OSP) on copper. Four different profiles were developed with the maximum peak temperatures of 210oC and 215oC and time above liquidus ranging from 60 to 120 seconds using Sn-Pb paste. One profile was generated for a lead-free control. A total of 60 boards were assembled. Some of the boards were subjected to an as assembled analysis while others were subjected to an accelerated thermal cycling (ATC) test in the temperature range of -40oC to 125oC for a maximum of 3500 cycles in accordance with IPC 9701A standard. Weibull plots were created and failure analysis performed. Analysis of as-assembled solder joints revealed that for a time above liquidus of 120 seconds and below, the degree of mixing between the BGA SAC ball alloy and the Sn-Pb solder paste was less than 100 percent for packages with a ball pitch of 0.8mm or greater. Depending on package size, the peak reflow temperature was observed to have a significant impact on the solder joint microstructural homogeneity. The influence of reflow process parameters on solder joint reliability was clearly manifested in the Weibull plots. This paper provides a discussion of the impact of various profiles' characteristics on the extent of mixing between SAC and Sn-Pb solder alloys and the associated thermal cyclic fatigue performance.

Sanmina-SCI

Review of Interconnect Stress Testing Protocols and Their Effectiveness in Screening Microvias

Technical Library | 2016-11-30 15:53:15.0

The use of microvias in Printed Circuit Boards (PCBs) for military hardware is increasing as technology drives us toward smaller pitches and denser circuitry. Along with the changes in technology, the industry has changed and captive manufacturing lines are few and far between. As PCBs get more complicated, the testing we perform to verify the material was manufactured to our requirements before they are used in an assembly needs to be reviewed to ensure that it is sufficient for the technology and meets industry needs to better screen for long-term reliability. The Interconnect Stress Testing (IST) protocol currently used to identify manufacturing issues in plated through holes, blind, or buried vias are not necessarily sufficient to identify problems with microvias. There is a need to review the current IST protocol to determine if it is adequate for finding bad microvias or if there is a more reliable test that will screen out manufacturing inconsistencies. The objective of this research is to analyze a large population of PCB IST coupons to determine if there is a more effective IST test to find less reliable microvias in electrically passing PCB product and to screen for manufacturing deficiencies. The proposed IST test procedure will be supported with visual inspection of corresponding microvia cross sections and Printed Wiring Assembly (PWA) acceptance test results. The proposed screening will be shown to only slightly affect PCB yield while showing a large benefit to screening before PCBs are used in an assembly.

Raytheon

Express Newsletter: pcb buyer/distributor/trading company/commercial company in canada (997)

SMTnet Express - April 23, 2020

SMTnet Express, April 23, 2020, Subscribers: 36,173, Companies: 10,991, Users: 25,763 Flexible Bioelectronics For Physiological Signals Sensing And Disease Treatment Credits: University of Electronic Science and Technology of China This review

The Application of Spherical Bend Testing to Predict Safe Working Manufacturing Process Strains

The Application of Spherical Bend Testing to Predict Safe Working Manufacturing Process Strains SMTnet Express January 9, 2013, Subscribers: 26086, Members: Companies: 9075, Users: 34138 The Application of Spherical Bend Testing to Predict Safe


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Precision PCB Services, Inc
Precision PCB Services, Inc

Products, Services, Training, and Consulting for the assembly, rework & repair of electronic assemblies. BGA process experts. Manufacturers Rep & Sole Agent in North America for Shuttle Star BGA Rework Stations.

Training Provider / Service Provider / Manufacturer's Rep / Equipment Dealer / Broker / Consultant

1750 Mitchell Ave.
Oroville, CA USA

Phone: (888) 406-2830