Wafer distribution system and wafer distribution method

Abstract

The invention relates to a wafer distribution system and a wafer distribution method. According to demands of each product, matching is carried out for one type of wafers from different supply sources, corresponding requirements of a technology integration department for a supply source of permitted use wafers of each product, product month / day plans provided by a production plan department, the stock of each wafer source, and purchase / replenishment plans during purchase are comprehensively considered, and wafer receiving quota of products at each source is set or adjusted by a quota control system. A wafer distribution system responds to wafer receiving requirements of a user, according to the receiving quota of products at each available source, the receiving quantity and the real-time stock are aggregated, so the quantity of the wafers which can be received at each supply source is calculated. Through the wafer distribution system and the wafer distribution method, a problem of wafer shortage or redundancy at different supply sources in the prior art can be solved, and quota-exceeding receiving demands can be satisfied through timely adjusting the quota or operating 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

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