IPC TM-650 2.4.24.2-1995
度有机薄膜的玻璃转变温-DMA的方法
Glass Transition Temperature of Organic Films - DMA Method
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- 适用范围
- IPC-TR-464 was originally published in April of 1984. This Technical Report was developed to meet the growing need for a standard method of evaluating the solderability retention capability of printed circuit parts during inventory storage. The report indicated that a 1-4 hour aging procedure was in'adequate to assure the level of acceptable solderability required by the industry. A 20-24 hour aging times was recommended. Since the initial publications of IPC-TR-464, additional research has taken place on accelerated aging; better leadltermination coatings are being used to meet aging requirements imposed by the industry. In 1986 the Accelerated Aging Task Group of the IPC was reactivated to . Evaluate the most recent research to determine if the aging period could be shorted, and still provide the appropriate information on solderability retention. This addendum to IPC-TR-464 published December 1987 represents the results of the task group study.