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TW-Aluminum PCB 0201 Price: Get Latest Price Minimum Order Quantity: 10 Unit/Units other Port: HK Packaging Details: blister and package Delivery Time: 1 week Payment Terms: L/C,D/P,T/T,Western Union Supply Ability: 5000000 Unit/Units per Y
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.
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No. Items technological Capability 1 Layer 1-20 layer 2 Copper thickness 0.5-4.0oz 3 Board thickness 0.2mm-6.0m
Industry News | 2016-06-10 09:45:09.0
Cranston RI - Technic is pleased to announce the installation of the TechniPad Electroless Palladium process AT7015 at Gold Plating Services (GPS) in Santa Clara CA. GPS is a contract plating service specializing in precious metal plating for the printed circuit board industry.
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Quick turn Prototype PCBs from 24 hour turnaround to high volume printed circuit board production from our domestic plant in USA and/or China facilities. Our Modern 38,000 sq. ft. manufacturing plant with multi-million dollar investment with latest e
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TW-FPC--Flexible PCB 0187 Price: Get Latest Price Minimum Order Quantity: 10 Unit/Units other Port: HK Packaging Details: blister and package Delivery Time: 1 week Payment Terms: L/C,D/P,T/T,Western Union Supply Ability: 5000000 Unit/Units p
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At Present the company is concentrating to meet Quick turn around/prototype and a Pilot Order requirement of :- Double Sided Pth & Multilayer upto 12 layers Printed Circuit Bare Board Material FR � 4 ( Nema � Grade ) with board thickness as per cus
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Printed Circuit Boards(PCBs) are used to electrically connect electronic components using conductive pathways, traces, etched from copper sheets laminated onto a non-conductive substrate. Our manufacturing processes utilise the latest techniques an