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Dynamic scheduling method based on pheromone for semiconductor production line

A dynamic scheduling and production line technology, applied in data processing applications, comprehensive factory control, instruments, etc., can solve problems such as changing queuing methods and poor flexibility

Inactive Publication Date: 2008-05-07
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] The above published patents are mainly based on rules, and only focus on one or a few performance indicators, especially the on-time delivery rate is less considered; in addition, it is difficult to change the queuing method according to the actual needs of the production line to obtain different Performance index, poor flexibility

Method used

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  • Dynamic scheduling method based on pheromone for semiconductor production line
  • Dynamic scheduling method based on pheromone for semiconductor production line
  • Dynamic scheduling method based on pheromone for semiconductor production line

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Embodiment Construction

[0062] Further illustrate the concrete technical scheme of the present invention below in conjunction with accompanying drawing description:

[0063] Each WIP in the present invention represents one product among multiple product types manufactured using a semiconductor production line, and the present invention can also be applied to all WIPs in a single product type. The method utilizes a pheromone-based multi-objective optimization method to generate selection variables for WIP awaiting processing at each facility. The method selects the WIP with the largest selection variable for processing at each facility.

[0064] Specifically, once a notification that a certain device is available is received, the method is used to read the selection variables of each WIP in the buffer of the device, and select the WIP with the largest selection variable for processing.

[0065] In addition, when a product is complete, that is, when a WIP is fully processed through a semiconductor pro...

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Abstract

The invention discloses a dynamic dispatching method on the base of pheromone in semi-conductive product line, which comprises the following steps: first, storing pheromone variation of each WIP which relates to the WIP delivery date, holding time of waiting processing equipment, pure processing time and production periodic multiplication factor; second, storing pheromone variation which relates to equipment load; then, integrating the WIP pheromone variation and relating equipment pheromone variation, generating a selective variation of each WIP; finally, elaborating them on the equipment according to the method which consists of short-term and long-term function index to improve multi-function index production or making system.

Description

technical field [0001] The present invention relates to a scheduling method, and more specifically, relates to a dynamic scheduling method for a semiconductor production line. The method uses a multi-objective optimization strategy to determine unfinished products (hereinafter referred to as work in progress, WIP) for each device on the semiconductor production line. ) competing processing priority. Background technique [0002] In a production system using assembly line workshop processing, a conveyor system transports the WIP along the workbench, and at each workbench, a different process of the WIP is completed. In theory, the WIP visits each station once during a start-to-finish machining run. A semiconductor production line is different from most production systems that use assembly-line shop processing. In the semiconductor production line, WIP may visit the same workbench several times during the processing process. WIP has to go through several cleaning, oxidation,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418G06Q99/00
CPCY02P90/02
Inventor 吴启迪乔非李莉
Owner TONGJI UNIV
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