Powerchip Semiconductor Manufacturing Corporation

Powerchip Technology Corporation

Ching-Ly Yueh

Chien-Chung Chen

Ying-Ju Wu

Pao-Ju Pao

Chiu-Chieh Lin

Li-Chin Wang

Jr-Rung Shiu

The disclosure provides a wafer searching method and device. The method includes: obtaining a target wafer and a reference wafer; determining a first specific area in the target wafer, and obtaining a first significant distribution feature of the first specific area; determining a second specific area in the reference wafer, and obtaining a second significant distribution feature of the second specific area; in response to determining that the first significant distribution feature corresponds to the second significant distribution feature, estimating a fail pattern similarity between the first specific area and the second specific area; in response to determining that the fail pattern similarity is greater than a threshold, providing the reference wafer as a search result corresponding to the target wafer.

Wafer searching method and device

Provided is a method for generating a chip probing wafer map, and the method includes: obtaining test data associated with a first chip, wherein the first chip includes a plurality of sequentially arranged first dies, and each of the first dies belongs to one of a plurality of bin numbers; assigning different predetermined color codes to the bin numbers; and generating a first general chip probing wafer map for the first chip by assigning a color code of each of the first dies as a corresponding predetermined color code according to the bin number to which each of the first dies belongs.

Method for generating chip probing wafer map

The invention provides a wafer map identification method, which includes the following steps: obtaining a wafer map of at least one to-be-identified wafer; performing an image processing operation on the wafer map and a reference pattern, wherein the image processing operation includes: performing a convolution operation on the wafer map and the reference pattern respectively, extracting a critical feature of the wafer map after the convolution operation, and calculating a weight distribution based on the reference pattern after the convolution operation; and calculating a similarity between the processed wafer map and the processed reference pattern to identify the wafer map. The invention also provides a computer-readable recording medium recording the above identification method.

Wafer map identification method and computer-readable recording medium

A nonparametric method for measuring a clustered level of time rank in binary data is provided. A sample set of engineering data is classified into a target group and a reference group, and a rank is set to each sample in a chronological order. A minimum rank and a maximum rank are obtained from the target group, by which a characteristic period is defined. In the characteristic period, an average rank values of the target group and an average rank value of the reference group are calculated. After creating a dummy sample set, the dummy sample set is incorporated into an analysis data set and a new rank is set based on a comparison result of the average rank value of the target group and the average rank value of the reference group, and the minimum rank and the maximum rank of the characteristic period to obtain adjusted test data. A Mann-Whitney U test is executed on the adjusted test data to obtain a clustered level index of time rank in binary data.

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Hsinchu, Taiwan

Ching-Ly Yueh