Industry News | 2008-10-07 20:52:28.0
OSAKA, JAPAN � October 2008 � Nihon Superior USA, a subsidiary of Nihon Superior Co. Ltd., an advanced soldering supplier to the worldwide market, announces that it will feature a newly expanded range of SN100C products, which includes new halogen-free solder paste, in booth 402 at the upcoming Mexitr�nica exhibition, scheduled to take place October 21-23, 2008 at the Expo Guadalajara, Hotel Hilton, in Guadalajara, Jalisco, M�xico.
Industry News | 2020-09-06 04:46:35.0
Weller Erem™, the world's No.1 brand in precision tool solutions, is pleased to announce that it has rebranded and relaunched 300 products worldwide.
Technical Library | 2016-01-12 11:03:35.0
With the pitch size of interconnect getting finer and finer, the bonding strength between flexible and rigid (e.g. PCB, ceramic) substrates becomes a serious issue because it is not strong enough to meet the customer’s requirement. Capillary underfill has been used to enhance the bonding strength between flexible and rigid substrates, but the enhancement is very limited, particularly for high temperature application. The bonding strength of underfilled flexible/rigid interconnect is dramatically decreased after being used at 180◦C, and the interconnects are weakened by the internal stress caused by the expansion of underfill at high temperatures. In order to resolve reliability issues of the interconnect between flexible/rigid substrates, solder joint encapsulant was implemented into the thermal compression bonding process, which was used to manufacture the interconnect between flexible/rigid substrates. Compared to the traditional process, the strength of the interconnect was doubled and the reliability was significantly improved in high temperature application.
Industry News | 2009-11-02 21:58:24.0
OSAKA, JAPAN — November 2009 — Nihon Superior Co. Ltd., a supplier of advanced soldering materials to the global electronics industry announces that it will display a full range of products based on its unique lead-free solder SN100C in its booth at the SMTA Southeast Asia Technical Conference on Electronics Assembly Technologies at the Equatorial Hotel in Penang, Malaysia, November 18-20, 2009.
Industry News | 2021-05-21 03:59:59.0
The Assembly Division of MacDermid Alpha Electronics Solutions will be presenting a technical paper: 'Advantages of Prefluxed Ribbon-wire in Multi busbar Interconnection' at the SNEC 15th(2021) International Photovoltaic Power Generation and Smart Energy Conference &Exhibitiontaking placein Shanghai, China on June 2-5,2021.
Technical Library | 2015-12-31 15:19:28.0
Today's consumer electronic product are characterized by miniatuization, portability and light weight with high performance, especially for 3G mobile products. In the future more fine pitch CSPs (0.4mm) component will be required. However, the product reliability has been a big challenge with the fine pitch CSP. Firstly, the fine pitch CSPs are with smaller solder balls of 0.25mm diameter or even smaller. The small solder ball and pad size do weaken the solder connection and the adhesion of the pad and substrate, thus the pad will peel off easily from the PCB substrate. In addition, miniature solder joint reduce the strength during mechanical vibration, thermal shock, fatigue failure, etc. Secondly, applying sufficient solder paste evenly on the small pad of the CSP is difficult because stencil opening is only 0.25mm or less. This issue can be solved using the high end type of stencil such as Electroforming which will increase the cost.
Technical Library | 2018-07-11 22:46:13.0
For a demanding automotive electronics assembly, a highly thermal fatigue resistant solder alloy is required, which makes the lead-free Sn-Ag-Cu type solder alloy unusable. Sn-Ag-Bi-In solder alloy is considered as a high reliability solder alloy due to significant improvement in thermal fatigue resistance as compared to a standard Sn-Ag-Cu alloy. The alloy has not only good thermal fatigue properties but it also has superior ductility and tensile strength by appropriate addition of In; however, initial results indicated a sub-par performance in joint reliability when it is soldered on a printed circuit board (PCB) with Electroless Nickel Immersion Gold (ENIG) surface finish. Numerous experiments were performed to find out appropriate alloying element which would help improve the performance on ENIG PCBs. Sn-Ag-Bi-In solder alloys with and without Cu additions were prepared and then tests were carried out to see the performance in a thermal fatigue test and a drop resistance test.to investigate the impact of Cu addition towards the improvement of joint reliability on ENIG finish PCB. Also, the mechanism of such improvement is documented.
Industry News | 2016-02-25 14:29:00.0
SHENMAO Features a new Sn-3.0Ag-0.5Cu Lead-Free Solder Paste PF606-P133H for laser soldering applications. Dispensed from syringes, it is developed for automatic laser soldering processes in the packaging and assembly of surface mount devices and microelectronics. Laser energy is applied at the precise location in a non-contact procedure to create high shear strength well-formed solder joints during the lower thermal stress process while reducing intermetallic formation. PF606-P133H solder paste produces minimal flux residue and no-splash or solder balling issues. It is well suited for high yield soldering of sensitive electronic components in manufacturing or repair of electronic devices that can-not tolerate conventional reflow-oven temperature.
Industry News | 2016-05-31 20:58:06.0
SHENMAO Features a new Sn-3.0Ag-0.5Cu Lead-Free Solder Paste PF606-P133H for laser soldering applications. Dispensed from syringes, it is developed for automatic laser soldering processes in the packaging and assembly of surface mount devices and microelectronics. Laser energy is applied at the precise location in a non-contact procedure to create high shear strength well-formed solder joints during the lower thermal stress process while reducing intermetallic formation. PF606-P133H solder paste produces minimal flux residue and no-splash or solder balling issues. It is well suited for high yield soldering of sensitive electronic components in manufacturing or repair of electronic devices that can-not tolerate conventional reflow-oven temperature.
Technical Library | 2020-09-23 21:37:25.0
The need to minimise thermal damage to components and laminates, to reduce warpage-induced defects to BGA packages, and to save energy, is driving the electronics industry towards lower process temperatures. For soldering processes the only way that temperatures can be substantially reduced is by using solders with lower melting points. Because of constraints of toxicity, cost and performance, the number of alloys that can be used for electronics assembly is limited and the best prospects appear to be those based around the eutectic in the Bi-Sn system, which has a melting point of about 139°C. Experience so far indicates that such Bi-Sn alloys do not have the mechanical properties and microstructural stability necessary to deliver the reliability required for the mounting of BGA packages. Options for improving mechanical properties with alloying additions that do not also push the process temperature back over 200°C are limited. An alternative approach that maintains a low process temperature is to form a hybrid joint with a conventional solder ball reflowed with a Bi-Sn alloy paste. During reflow there is mixing of the ball and paste alloys but it has been found that to achieve the best reliability a proportion of the ball alloy has to be retained in the joint, particular in the part of the joint that is subjected to maximum shear stress in service, which is usually the area near the component side. The challenge is then to find a reproducible method for controlling the fraction of the joint thickness that remains as the original solder ball alloy. Empirical evidence indicates that for a particular combination of ball and paste alloys and reflow temperature the extent to which the ball alloy is consumed by mixing with the paste alloy is dependent on the volume of paste deposited on the pad. If this promising method of achieving lower process temperatures is to be implemented in mass production without compromising reliability it would be necessary to have a method of ensuring the optimum proportion of ball alloy left in the joint after reflow can be consistently maintained. In this paper the author explains how the volume of low melting point alloy paste that delivers the optimum proportion of retained ball alloy for a particular reflow temperature can be determined by reference to the phase diagrams of the ball and paste alloys. The example presented is based on the equilibrium phase diagram of the binary Bi-Sn system but the method could be applied to any combination of ball and paste alloys for which at least a partial phase diagram is available or could be easily determined.
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