12/20/2011 - Moveable Ground Pin in QFP Test & Burn-In
Munich, December 2011 – Yamaichi Electronics introduces the moveable ground pin for its popular Open Top socket series IC357 for QFP type IC packages with exposed pad in test & burn-in applications.
Equipment used in today’s modern life is taking over more and more ‘smart’ functionalities that lead to a continuously increasing amount of embedded electronic components. At the same time, the trend for more compactness let IC packages become denser than ever.
Among such high density packages, the QFP has proven to be the right choice when it comes to combine high functional integration with excellent connection reliability. With its gull-wing shaped lead feet surface mount, QFP is most tolerant towards vibration, flexing, warping and other stress applied to the PCB. This mechanical reliability has been the reason why QFP is the first choice for industries that are operating in harsh conditions such as automotive.
With the highly reliable double lead foot contact, it is easy to understand the success of Yamaichi’s Open Top Socket Series IC357 when it comes to connecting QFP packages for various test and burn-in applications.
Beside of the connection reliability, issues like heat dissipation and RF property often require test sockets to be equipped with components that can handle cooling and grounding. Under-standing this important necessity, Yamaichi has furnished its test and burn-in sockets with a variety of ground pin and heat slug options. In particular the IC357 series offers no less than five different solutions to ground the QFP’s exposed pad either electrically or thermally or both in combination.
The additional exposed pad connection however has brought a new challenge to socket design: a spring loaded center pin – a common solution – mainly pushes the package away from its ideal insertion plane during loading. Possible counter measures often add technical complexity to auto load handler resulting in manual load capable sockets only.
To overcome this problem, Yamaichi Electronics has applied a new design to the ground pin in its IC357 series socket. The revolutionary design allows the center pin to actuate in conjunction with the movement of the push cover. While the push cover is being hold down, the center pin retracts completely to allow the package to be guided into its position. When the push cover is released, lead foot contacts are actuated first holding the package firmly in its plane before the center pin comes into action. This two step actuation ensures that the IC357 series remains auto load capable and reliable for all future test and burn-in applications.
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About Yamaichi Electronics:
Yamaichi Electronics Deutschland GmbH was established in 1990 and has its headquarters in Munich. We are the European partner for sockets, connectors and cables, we have over 120 employees, and last year achieved a turnover of more than 36 million Euro.
Our knowledgeable and experienced domestic sales staff is supported by a European sales network. We are constantly designing and improving our products to meet the demands of this changeable state-of-the-art business, thereby following the high technical standards required by our customers. In 1996 YAMAICHI ELECTRONICS Deutschland formed two subsidiary companies in Great Britain and Italy to further an even closer relationship to our customers.
About Logic Technology
Founded in 1993, headquartered in Panningen The Netherlands, Logic Technology has become a leader in Europe's embedded market. The unique combination of high-quality products, support and consultancy services is most appreciated by embedded developers. It's this All-Inclusive concept that enables developers to focus on their own key tasks and provides them with a sparring partner in every phase of their project!
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