ZN Technologies (www.zntechnologies.com) is proud to offer warpage/coplanarity measurement services to customers worldwide. Using the most advanced moire technique available (projection moire), ZN can measure BGA, PCB and IC warpage, even during ref
New Equipment | Rework & Repair Services
Process Sciences specializes in the rework of BGA, LGA and QFN devices, BGA connectors, and various styles of bottom terminated SMDs. Driven by customer demands in the early 1990's, PSI developed custom convection air rework solutions for BGA dev
Electronics Forum | Wed Jan 20 13:07:16 EST 1999 | Robert Noory
I have received prototype PBGA (256 pins) devices from Motorola (actual part number = KXPC850ZT50). These parts seemed very warped on the edges. When I put the part on a plain surface, it rocks quite a bit when I press lightly on a corner. I have
Electronics Forum | Wed Jan 13 19:13:59 EST 1999 | Michael Allen
Just a comment: we've seen PBGAs curl up at the corners, but only on prototype components that came off of a low-volume "prototype" line at our component supplier's lab (non-production overmold material was used). Production parts have not exhibite
Used SMT Equipment | Pick and Place/Feeders
Type Pick and Place machineDimension off-line (L x W x H) 2150 x 1700 x 1500 mm (+500 mm for signal light)Dimension in-line (L x W x H) 1750 x 1300 x 1500 mm (+500 mm for signal light)Board thickness min. 0.5 mm - max. 4.5 mm thickBoard size min. 30
Industry News | 2010-04-30 18:47:15.0
SMTA China announces that it presented awards for the 10 best papers/presentations and two best exhibits at the SMTA China East 2010 Conference Award Presentation Ceremony, held on Wednesday, April 21, 2010 at the Shanghai Everbright International Hotel in conjunction with the SMTA China Annual Breakfast Reception.
Industry News | 2012-02-23 14:43:13.0
IPC has announced the winners of the Best U.S. and International Papers of IPC APEX EXPO® 2012. Selected through a ballot process by the event’s Technical Program Committee, the papers will be presented at IPC APEX EXPO, February 28–March 1, at the San Diego Convention Center.
Parts & Supplies | SPI / Solder Paste Inspection
Quick programming, friendly programming interface Multiple measurement methods True one-button measurement Eight-way motion button, one-click focus Adjustable scanning pitch Solder paste 3D simulation function Powerful SPC function MARK
Technical Library | 2017-07-06 15:50:17.0
Head-in-pillow (HiP) is a BGA defect which happens when solder balls and paste can't contact well during reflow soldering. Package warpage was one of the major reasons for HiP formation. In this paper, package warpage was measured and simulated. It was found that the package warpage was sensitive to the thickness of inside chips. A FEM method considering viscoelastic property of mold compound was introduced to simulate package warpage. The CTE mismatch was found contributes to more than 90% of the package warpage value when reflowing at the peak temperature. A method was introduced to measure the warpage threshold, which is the smallest warpage value that may lead to HiP. The results in different atmospheres showed that the warpage threshold was 50μm larger in N2 than that in air, suggesting that under N2 atmosphere the process window for HiP defects was larger than that under air, which agreed with the experiments.
Technical Library | 2022-12-23 20:44:54.0
One of the upcoming reliability issues which is related to the lead-free solder introduction, are the headin-pillow solderability problems, mainly for BGA packages. These problems are due to excessive package warpage at reflow temperature. Both convex and concave warpage at reflow temperature can lead to the head-in-pillow problem where the solder paste and solder ball are in mechanical contact but not forming one uniform joint. With the thermo-Moiré profile measurements, this paper explains for two flex BGA packages the head-in-pillow. Both local and global height differences higher than 100 µm have been measured at solder reflow temperature. This can be sufficient to have no contact between the molten solder ball and solder paste. Finally, the impact of package drying is measured
Events Calendar | Mon Apr 23 00:00:00 EDT 2018 - Thu Apr 26 00:00:00 EDT 2018 | Shanghai, China
SMTA China East Conference 2018
Career Center | Phoenix, Arizona | Engineering,Management,Production,Quality Control,Research and Development,Sales/Marketing,Technical Support
• Highly motivated, solution oriented professional with proven record synergizing scientific, engineering, and business administration backgrounds to drive and sustain customer satisfaction and long term improvements. • Articulate communicator that a
SMTnet Express, July 6, 2017, Subscribers: 30,558, Companies: 10,626, Users: 23,470 Effects of Package Warpage on Head-in-Pillow Defect Zhenyu Zhao, Chuan Chen, Yuming Wang, Lei Liu, Guisheng Zou, Jian Cai and Qian Wang - Tsinghua University
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/dage/about/blog/heated-stage
) and BGA ball and solder paste alloy differences. During reflow, board/component warpage, poor wetting and co-planarity issues can also create this
| https://www.smtfactory.com/High-Speed-SMT-AOI-Machine-in-PCB-Board-Off-Line-Model-I-C-T-V8-pd48670624.html
(Test deviation accuracy less than ±0.25mm. 6. Camera move,conveyor fixed during test. 7. PCB warpage conpensation:total Mark compensation calibration,conponent position frame compensation
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