A wafer distribution system and distribution method

Abstract

The present invention relates to a wafer distribution system and distribution method, which matches wafers of the same type and different supply sources in the demand of each product, and allows each product to use wafer supply for products by comprehensively considering the process integration department. The source, the monthly / daily production plan of the product given by the production planning department, the inventory of each wafer source, the corresponding requirements of the purchase and replenishment plan at the time of purchase, and the quota control system for the wafers of the product at each source Quotas are used to set or adjust. Then, the wafer distribution system responds to the user's wafer requisition demand, and calculates the number of wafers that can be reclaimed from each source according to the product requisition quota at each available source, the cumulative requisition amount and the real-time inventory. The present invention solves the problem of wafer outage or redundancy that may occur at different sources, and the over-quota demand can also be met by adjusting the quota in time or running an over-quota processing algorithm.

Description

technical field [0001] The invention relates to a wafer distribution system and a distribution method in the field of semiconductor production. Background technique [0002] Wafer is the most basic raw material in the manufacture of semiconductor integrated circuits. However, according to industry standards, even the same wafer may have performance differences due to different sources of the wafer (that is, different suppliers or different factories of the same supplier), and the resulting Product quality has a certain impact. [0003] Then, assuming that for the same type of wafer, the company's procurement department will buy qualified wafers from five sources A\B\C\D\E. The process integration department will consider performance such as yield rate, and limit the production of the first product to wafers from source A, the second product to wafers from three sources B\C\D, and the third product to Wafers from five sources A\B\C\D\E can be used, and the fourth product c...

AI Technical Summary

Problems solved by technology

[0004] Therefore, if there is no corresponding control method for the requisition or distribution of wafers, the management will be very chaotic: for example, assuming that the above-mentioned second and third products only receive wafers from D source, on the one hand, it will cause D If the wafers from the source inventory are cut off, then the corresponding wafers will not be received when the fourth product is needed, and the production will be forced to suspend; on the other hand, it will also make wafers from other sources (such as source B) become redundant. surplus inventory, and cannot be used by other products

And worst of all, the material planning department has no prior knowledge or prediction of wafer outages or redundancy issues due to random pick-ups

Images