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Technical Library | 2016-01-12 11:05:28.0
The electronic industry is currently very interested in low temperature soldering processes such as using Sn/Bi alloy to improve process yield, eliminate the head-in-pillow effect, and enhance rework yield. However, Sn/Bi alloy is not strong enough to replace lead-free (SAC) and eutectic Sn/Pb alloys in most applications. In order to improve the strength of Sn/Bi solder joints, enhance mechanical performance, and improve reliability properties such as thermal cycling performance of soldered electronic devices, YINCAE has developed a low temperature solder joint encapsulant for Sn/Bi soldering applications. This low temperature solder joint encapsulant can be dipped, dispensed, or printed. After reflow with Sn/Bi solder paste or alloy, solder joint encapsulant encapsulates the solder joint. As a result, the strength of solder joints is enhanced by several times, and thermal cycling performance is significantly improved. All details will be discussed in this paper.
Technical Library | 2010-04-29 21:40:37.0
The purpose of this paper is to investigate the effects of reflow time, reflow peak temperature, thermal shock and thermal aging on the intermetallic compound (IMC) thickness for Sn3.0Ag0.5Cu (SAC305) soldered joints.
New Equipment | Selective Soldering
Nitrogen is an essential part of the selective soldering process. Soldering without a nitrogen atmosphere leaves solder joints open to the possibility of oxidizing. Individual components will not maintain the long term reliability expected in the har
New Equipment | Solder Materials
Nitrogen is an essential part of the selective soldering process. Soldering without a nitrogen atmosphere leaves solder joints open to the possibility of oxidizing. Individual components will not maintain the long term reliability expected in the har
Classic PCB Profiling tools are used to create a repeatable thermal process that meets the specifications required by the solder paste and or component manufacturers. Only by profiling do you have any idea of what the actual temperatures are on the c
Used SMT Equipment | AOI / Automated Optical Inspection
M22XDL• Automatic Optical Inspection of PCB’s• Inspects: – SMT & THT Components (presence, type, polarity, offset, text etc)– Reflow and Wave Solder Joints (including meniscus)– Solder Paste (2 dimensional)• High Speed Digital XGA Colour Camera (Came
Technical Library | 2024-06-23 21:57:16.0
Two extremes of reflow time scale for copper pillar flip chip solder joints were explored in this study. Sn-2.5Ag solder capped pillars were joined to laminate substrates using either conventional forced convection reflow or the controlled impingement of a defocused infrared laser. The laser reflow joining process was accomplished with an order of magnitude reduction in time above liquidus and a similar increase in solidification cooling rate. The brief reflow time and rapid cooling of a laser impingement reflow necessarily affects all time and temperature dependent phenomena characteristic of reflowed molten solder. These include second phase precipitate dissolution, base metal (copper) dissolution, and the extent of surface wetting. This study examines the reflow dependent microstructural aspects of flip chip Sn-Ag joints on samples of two different size scales, the first with copper pillars of 70μm diameter on 120μm pitch and the second with 23μm diameter pillars on a 40μm pitch. The length scale of Pb-free solder joints is known to affect the Sn grain solidification structure; Sn grain morphology will be noted across both reflow time and joint length scales. Sn grain morphology was further found to be dependent on the extent of surface wetting when such wetting circumvented the copper diffusion barrier layer. Microstructural analysis also will include a comparison of intermetallic structures formed; including the size and number density of second phase Ag3Sn precipitates in the joint and the morphology and thickness of the interfacial intermetallics formed on the pillar and substrate surfaces.
New Equipment | Education/Training
Bob Willis has an extensive range of training videos available online. The complete video collection is available to view online for a fixed fee, based on a six month period. After purchase you are provided with links to each of the online videos for
New Equipment | Solder Materials
Cobar XF3 Solder Paste Completes SN100C Solder Materials System; Superior Reflow, Printing Performance over SAC Alloys. XF3 is a lead-free solder paste, developed to accommodate extended reflow profiles without use of nitrogen. XF3 completes the
