ChangDa Composite Materials Manufacturing Co.,Ltd was founded in 2001, it is a comprehensive company that engaged in R&D, production and marketing of thermal insulation and ESD reinforced plastics and solder pallet materials.
Industry Directory | Manufacturer
Scienscope supplies inspection equipment, including stereo zoom microscopes, video an X-Ray inspection equipment, automated optical inspection systems, magnifiers, measurement systems.
High-end Customized Reflow Soldering Oven ❙ Introduce of Reflow Oven ETA provide high reliability special reflow oven, SMD reflow soldering oven, radiator reflow oven, hot air reflow oven, for radiator production line. Special reflow o
Radiator Reflow Soldering Oven for SMD Assembly Line ❙ Introduce of Reflow Oven ETA provide high reliability special reflow oven, SMD reflow soldering oven, radiator reflow oven, hot air reflow oven, for radiator production line. Speci
Electronics Forum | Sat Oct 06 05:33:47 EDT 2001 | spchua
I had recently encounter the "black and grey" pads problems for the BGA pad after the convection re-flow. The pads shows in in "black and grey" color and a litter solder in it, and it happen in ramdom, when applied heat and solder on the "black and g
Electronics Forum | Sat Oct 06 08:42:21 EDT 2001 | davef
Please give us additional background on your board, solder, process, etc. If you are talking about black pad in ENIG solderability preservative, check the fine SMTnet archives to get started.
Used SMT Equipment | Soldering - Reflow
Heating zones: 5 Cooling zones: 2 Total heating length: 66 in. Total cooling length: 26 in. Total process length: 127 in. Total on /off load length: 11 in. Overall system length: 138.5 in. Overall system width: 52 in. Overall system height: 5
Used SMT Equipment | Screen Printers
Description: Automatic Screenprinter, Color: grey / light grey, Clamping 400 mm, printing area max. 508 x 508 mm; operating system WIN 7 Professional 32 Bit, EKRA unser interface ESP001-416 FULLY REFURBISHED IN 2019! Special Equipment:
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 | 2018-11-27 13:54:13.0
Super PCB, a single source for high-quality printed circuit boards (PCBs), is pleased to offer aluminum and FR4 PCBs for LED lighting. The company can produce both prototypes and mass production for LED lighting applications.
Technical Library | 2014-06-23 14:50:52.0
It was unusual to see chip terminations change colors when tin lead solders were used but with the introduction of lead free reflow soldering and the corresponding increases in reflow temperatures terminations are now changing colors. Two conditions are present when reflow temperatures are increased for lead free solder alloys that leads to discoloration. Reflow temperatures are above the melting point of tin (Sn MP is 232oC). Air temperatures commonly used in forced convection reflow systems are high enough to both melt the tin plating on the termination allowing it to be pulled into the solder joint due to solder joint liquid solder surface tension leaving behind the exposed nickel barrier. Now those metal oxide colors will be visible due to high air temperatures during reflow.
Radiator Reflow Soldering Oven for SMD Assembly Line ❙ Introduce of Reflow Oven ETA provide high reliability special reflow oven, SMD reflow soldering oven, radiator reflow oven, hot air reflow oven, for radiator production line. Speci
High Reliability Heat Sink Reflow Soldering Ovens ❙ Introduce of Reflow Oven ETA provide high reliability special reflow oven, SMD reflow soldering oven, radiator reflow oven, hot air reflow oven, for radiator production line. Special
| https://pcbasupplies.com/leaded-solder-wire/
(%) 0.0 Silver chromate paper test No discoloration Solder spread factor (%) 90 Solder wetting speed*1 (sec.) < 0.5 Aqueous solution resistivity* 2 (Ω • cm) > 1
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/dage/technical-experts/2d-x-ray-inspection
. In many cases, X-Ray inspection (2D and 3D) provides the only non-destructive techniques to inspect optically hidden components and solder joints such as BGA, POP, QFN, flip chips, through holes, TSVs, micro-bumps, copper pillars, etc
