Used SMT Equipment | Assembly Accessories
LPKF Multipress II 2005 220VAC Single phase Appears to be in like new condition. Powers up and cycles. FOB: Origin Also available: LPKF Bench top printer and LPKF Zelflow bench top reflow oven OEM Description: Footprint: approx. 0.25 m²
Used SMT Equipment | Screen Printers
EKRA X6 Screen and Stencil Printer Year: 2006 Reconditioned, in perfect working order. Automatic In-Line Stencil printer with steel welded frame; Two independent pneumatic Print Heads; EVA™ vision system with 2 cameras; Side and Top Clam
New Equipment | Coating Materials
Technic Releases TechniFlex LCL1000F/423M New Flexible Black Soldermask for Direct Imaging Cranston, RI, USA - Technic has announced the release of TechniFlex LCL1000F/423M, an extremely durable, direct imaging, fine pitch, matte black solder mask
Technical Library | 2020-10-27 02:07:31.0
For companies that choose to take the Pb-free exemption under the European Union's RoHS Directive and continue to manufacture tin-lead (Sn-Pb) electronic products, there is a growing concern about the lack of Sn-Pb ball grid array (BGA) components. Many companies are compelled to use the Pb-free Sn-Ag-Cu (SAC) BGA components in a Sn-Pb process, for which the assembly process and solder joint reliability have not yet been fully characterized. A careful experimental investigation was undertaken to evaluate the reliability of solder joints of SAC BGA components formed using Sn-Pb solder paste. This evaluation specifically looked at the impact of package size, solder ball volume, printed circuit board (PCB) surface finish, time above liquidus and peak temperature on reliability. Four different BGA package sizes (ranging from 8 to 45 mm2) were selected with ball-to-ball pitch size ranging from 0.5mm to 1.27mm. Two different PCB finishes were used: electroless nickel immersion gold (ENIG) and organic solderability preservative (OSP) on copper. Four different profiles were developed with the maximum peak temperatures of 210oC and 215oC and time above liquidus ranging from 60 to 120 seconds using Sn-Pb paste. One profile was generated for a lead-free control. A total of 60 boards were assembled. Some of the boards were subjected to an as assembled analysis while others were subjected to an accelerated thermal cycling (ATC) test in the temperature range of -40oC to 125oC for a maximum of 3500 cycles in accordance with IPC 9701A standard. Weibull plots were created and failure analysis performed. Analysis of as-assembled solder joints revealed that for a time above liquidus of 120 seconds and below, the degree of mixing between the BGA SAC ball alloy and the Sn-Pb solder paste was less than 100 percent for packages with a ball pitch of 0.8mm or greater. Depending on package size, the peak reflow temperature was observed to have a significant impact on the solder joint microstructural homogeneity. The influence of reflow process parameters on solder joint reliability was clearly manifested in the Weibull plots. This paper provides a discussion of the impact of various profiles' characteristics on the extent of mixing between SAC and Sn-Pb solder alloys and the associated thermal cyclic fatigue performance.
Industry News | 2021-02-24 11:47:14.0
YINCAE is excited to announce that we have developed SMT 158N series, including a non-flow, low temperature slow cure and high purity liquid epoxy underfill and capillary underfill encapsulant.
Industry News | 2022-03-30 14:59:52.0
YINCAE is excited to announce that we have developed DA158N die attach materials which is thermal conductive and electrical insulating adhesives. It can be fast cured at low temperature. The development of DA 158N is preparing the materials for people to live in the Mars.
Industry Directory | Manufacturer
Design and Manufacture Desiccant Dry Cabinets for low humidity storage and baking of moisture sensitive components, PCBs, electronic materials, lab samples, digital media and medical devices.
Industry Directory | Manufacturer
Pioneers in the area of solderless assembly technology and originators of the OCCAM process. Developing IP for next and future generations of high reliability and better performing electronic products.
Industry Directory | Manufacturer
Anshan Leadsun Electronics Co., Ltd. was founded in 2001 and covers an area of 3,000 square meters.Our main products including HV diodes,HV rectifier blocks,HV multipliers,HV bridge rectifiers and HV power suppliers.
Technical Library | 2021-08-25 16:28:36.0
In this study, a Sn–Bi composite solder paste with thermosetting epoxy (TSEP Sn–Bi) was prepared by mixing Sn–Bi solder powder, flux, and epoxy system. The melting characteristics of the Sn–Bi solder alloy and the curing reaction of the epoxy system were measured by differential scanning calorimeter (DSC). A reflow profile was optimized based on the Sn–Bi reflow profile, and the Organic Solderability Preservative (OSP) Cu pad mounted 0603 chip resistor was chosen to reflow soldering and to prepare samples of the corresponding joint. The high temperature and humidity reliability of the solder joints at 85 #14;C/85% RH (Relative Humidity) for 1000 h and the thermal cycle reliability of the solder joints from
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