Technical Library | 2023-01-17 17:27:13.0
Reflow profile has significant impact on solder joint performance because it influences wetting and microstructure of the solder joint. The degree of wetting, the microstructure (in particular the intermetallic layer), and the inherent strength of the solder all factor into the reliability of the solder joint. This paper presents experimental results on the effect of reflow profile on both 63%Sn 37%Pb (SnPb) and 96.5%Sn 3.0%Ag 0.5%Cu (SAC 305) solder joint shear force. Specifically, the effect of the reflow peak temperature and time above solder liquidus temperature are studied. Nine reflow profiles for SAC 305 and nine reflow profiles for SnPb have been developed with three levels of peak temperature (230 o C, 240 o C, and 250 o C for SAC 305; and 195 o C, 205 o C, and 215 o C for SnPb) and three levels of time above solder liquidus temperature (30 sec., 60 sec., and 90 sec.). The shear force data of four different sizes of chip resistors (1206, 0805, 0603, and 0402) are compared across the different profiles. The shear force of the resistors is measured at time 0 (right after assembly). The fracture surfaces have been studied using a scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS)
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Industry News | 2003-03-04 08:08:23.0
In a move that broadens its interconnect design services, Micromark C and CD has introduced a new development kit for the Flexstrip jumpers flexible interconnect system.
Industry News | 2003-01-29 13:23:31.0
A Common Drain Configuration that is 80% Smaller than Devices in the TSSOP-8 Package
Industry News | 2003-02-25 09:10:01.0
The CSPEMI400 complements California Micro Devices' broad portfolio of CSP (chip scale package) devices for stand-alone ESD protection and EMI filter arrays with ESD protection, making it the most extensive in the industry.
Industry News | 2017-04-24 19:04:48.0
This year, MIRTEC will launch several new inspection machines equipped new cutting-edge technologies. MIRTEC is proud to be promoting these new machines in booth #1J10 at NEPCON China 2017, one of the biggest technical exhibitions of SMT and EMA, from April 25-27 at the Shanghai World EXPO Exhibition & Convention Center. MIRTEC’s new machines have been developed under a concept, ‘Perfect Inspection Solution’. This is an inspection concept involving the combination of 3D, 2D, and side-camera inspection.
Industry News | 2003-05-29 08:30:31.0
Losses halved in the first half year � New organization of electronics group next on the agenda
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Detailed introduction of 3D spi-7500 solder paste thickness gauge Product function Fast programming, friendly programming interface 1. Multiple measurement methods 2. True one button measurement 3. Eight square movement button, one key foc
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Product coefficient of KIC X5 furnace temperature tester Hardware performance: 1. Support all winoows software platform, USB key encryption function. 2. New dual power supply mode: No.7 (AAA) battery, USB power supply (Note: plug in the USB termin
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Detailed introduction of 3D spi-6500 solder paste thickness gauge Product function 1. Friendly programming interface 2. Multiple measurement methods 3. The scanning distance is adjustable 4. 3D simulation function of image 5. Independent
