公开(公告)号：US20120166130A1

公开(公告)日：2012-06-28

申请号：US12979914

申请日：2010-12-28

申请人： Yun-Chi YANG ,  Yen-Song Liu ,  Chin-Hsien Chen ,  Sheng-Yu Wu ,  Kuan-Cheng Su

发明人： Yun-Chi YANG ,  Yen-Song Liu ,  Chin-Hsien Chen ,  Sheng-Yu Wu ,  Kuan-Cheng Su

IPC分类号： G06F19/00

CPC分类号： G11C29/52 ,  G01R31/287 ,  G11C29/42 ,  G11C29/44 ,  G11C29/56008 ,  G11C2029/0409 ,  G11C2029/0411

摘要： A method for evaluating failure rate, which is applied to a plurality of semiconductor chips with error checking and correcting function includes the following steps. A first read-write test operation is applied to the semiconductor chips, thereby obtaining a plurality of first failure bit counting values. The error checking and correcting function of each of the semiconductor chips is off. An aging test is applied to the semiconductor chips. A second read-write test operation as the first read-write test operation is applied to the semiconductor chips, thereby obtaining a plurality of second failure bit counting values. The number of the semiconductor chips, the first failure bit counting values, the second failure bit counting values and an error checking and correcting coefficient are calculated to obtain a failure rate of the semiconductor chips.

摘要翻译： 一种用于评估故障率的方法，其应用于具有错误检查和校正功能的多个半导体芯片包括以下步骤。 对半导体芯片应用第一读写测试操作，从而获得多个第一故障比特计数值。 每个半导体芯片的错误检查和校正功能关闭。 对半导体芯片进行老化试验。 作为第一读写测试操作的第二读写测试操作被应用于半导体芯片，从而获得多个第二故障位计数值。 计算半导体芯片的数量，第一故障比特计数值，第二故障比特计数值和错误校验系数，以获得半导体芯片的故障率。