New Equipment | Assembly Services
Printed Circuit Boards ("PCBs") should be viewed as electronic real estate. Essentially, the reliability of the components that, combined with the PCB, make up your product are only as good as the foundation upon which they are assembled. The relia
1. Mounting Speed: chip 21k CPH (IPC9850) / QFP 5.5K CPH (IPC9850) 2. Corresponding components: Max 0402-55mm (component height H = 15mm) 3. Mounting accuracy: Cbip +/- 50um (Cpk 1.0) / QFP +/- 30UM (Cpk 1.0) 4. Corresponding PCB: L460 * W400 * 1L
Electronics Forum | Wed Oct 01 22:15:36 EDT 2003 | davef
Tough to say. It depends on the type of solder mask, the producer of the solder mask, and your board fabricators' process. As one angle on this, solder mask type affects thickness. Minimum clearance: * Liquid photoimageable: 2 thou * Screened liq
Electronics Forum | Wed Nov 17 10:03:29 EST 2010 | scottp
Instead of a minimum thickness, we require no exposed copper or SnCu intermetallic. We've been having a lot of trouble lately with suppliers of SN100 HASL boards giving us pads with very irregular solder deposits with areas of exposed intermetallic.
Used SMT Equipment | Flexible Mounters
Product Name: Samsung multi-function SM421 chip mounter Product number: SM421 Detailed product introduction Samsung multi function SM421 chip mounter Mounting speed: 21K CPH /QFP (IPC9850) 5.5K CPH Chip (IPC9850) The corresponding components: Ma
Used SMT Equipment | SMT Equipment
Product Name: Samsung multi-function SM421 chip mounter Product number: SM421 Detailed product introduction Samsung multi function SM421 chip mounter Mounting speed: 21K CPH /QFP (IPC9850) 5.5K CPH Chip (IPC9850) The corresponding components: Ma
Industry News | 2018-10-18 08:32:52.0
How to Prevent Solder Ball and Bridging Defects during the SMT Reflow Process
Industry News | 2012-07-25 15:16:14.0
The Balver Zinn Group announces that Cobar BV’s Gerjan Diepstraten will present a paper titled “Reflow Soldering Equals Wave Soldering Plus One” at the upcoming IPC Midwest Exhibition & Conference
Technical Library | 2012-12-13 21:20:05.0
First published in the 2012 IPC APEX EXPO technical conference proceedings. We investigated the micro-void formation of solder joints after reliability tests such as preconditioning (precon) and thermal cycle (TC) by varying the thickness of Palladium (Pd) in Electroless Nickel / Electroless Palladium / Immersion Gold (ENEPIG) surface finish. We used lead-free solder of Sn-1.2Ag-0.5Cu-Ni (LF35). We found multiple micro-voids of less than 10 µm line up within or above the intermetallic compound (IMC) layer. The number of micro-voids increased with the palladium (Pd) layer thickness. Our results revealed that the micro-void formation should be related to (Pd, Ni)Sn4 phase resulted from thick Pd layer. We propose that micro-voids may form due to either entrapping of volatile gas by (Pd, Ni)Sn4 or creeping of (Pd, Ni)Sn4.
Technical Library | 2021-07-20 20:02:29.0
During the manufacturing of printed circuit boards (PCBs) for a Flight Project, it was found that a European manufacturer was building its boards to a European standard that had no requirement for copper wrap on the vias. The amount of copper wrap that was measured on coupons from the panel containing the boards of interest was less than the amount specified in IPC-6012 Rev B, Class 3. To help determine the reliability and usability of the boards, three sets of tests and a simulation were run. The test results, along with results of simulation and destructive physical analysis, are presented in this paper. The first experiment involved subjecting coupons from the panels supplied by the European manufacturer to thermal cycling. After 17 000 cycles, the test was stopped with no failures. A second set of accelerated tests involved comparing the thermal fatigue life of test samples made from FR4 and polyimide with varying amounts of copper wrap. Again, the testing did not reveal any failures. The third test involved using interconnect stress test coupons with through-hole vias and blind vias that were subjected to elevated temperatures to accelerate fatigue failures. While there were failures, as expected, the failures were at barrel cracks. In addition to the experiments, this paper also discusses the results of finite-element analysis using simulation software that was used to model plated-through holes under thermal stress using a steady-state analysis, also showing the main failure mode was barrel cracking. The tests show that although copper wrap was sought as a better alternative to butt joints between barrel plating and copper foil layers, manufacturability remains challenging and attempts to meet the requirements often result in features that reduce the reliability of the boards. Experimental and simulation work discussed in this paper indicate that the standard requirements for copper wrap are not contributing to the overall board reliability, although it should be added that a design with a butt joint is going to be a higher risk than a reduced copper wrap design. The study further shows that procurement requirements for wrap plating thickness from Class 3 to Class 2 would pose little risk to reliability (minimum 5 μm/0.197 mil for all via types).Experimental results corroborated by modeling indicate that the stress maxima are internal to the barrels rather than at the wrap location. In fact, the existence of Cu wrap was determined to have no appreciable effect on reliability.
Panasonic AM100 SMT Pick and Place Machine If you could not find any similar items you want, you may send some photos to us. because our catalog and website haven't included allof our products. Pick and place machine, SMT pick and place machine
TR7700 SIII DT is a high performance desktop AOI solution designed for maximum precision and ease of use. Using TRI’s exclusive multi-phase lighting and next generation inspection software, TR7700 SIII DT delivers excellent defect detection with quic
Training Courses | ON DEMAND | | IPC-6012 Trainer (CIT)
The Certified IPC-6012 Trainer (CIT) courses recognize individuals as qualified trainers in the area of design, fabrication and inspection of rigid printed boards and prepare them to deliver Certified IPC-6012 Specialist (CIS) training.
Career Center | Erode, Tamilnadu India | Engineering
Professional Summary 3+ years of experience in the PCB CAM engineering Exposure to FRONTLINE GENESIS 2000 Having exposure in UCAM Exposure to Create, Array & Panelize it for manufacturability Experienced in Creating impedance cou
SMTnet Express, May 17, 2018, Subscribers: 31,044, Companies: 10,939, Users: 24,723 Statistical Aspect on the Measuring of Intermetallic Compound Thickness of Lead Free Solders Azman Jalar, Maria Abu Bakar, Roslina Ismail, Abdul Razak Daud
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PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/RSS_ipcjstd001-gull-wing-leads-and-solder-joints_topic2587.xml
. IPC-J-STD-001 Gull Wing Leads and Solder Joints : There is an exception to this... Author: Tom HSubject: 2587Posted: 13 Jan 2020 at 5:52pmThere is an exception to this rule and that is the DPAK gull wing lead thickness can be
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