US 12,438,026 B2
Method for operating conveying system
Yong-Jyu Lin, Hsinchu (TW); Fu-Hsien Li, Taichung (TW); Chen-Wei Lu, Hsinchu (TW); Chi-Feng Tung, Miaoli County (TW); and Hsiang Yin Shen, Hsinchu (TW)
Assigned to TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD., Hsinchu (TW)
Filed by TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD., Hsinchu (TW)
Filed on Nov. 23, 2023, as Appl. No. 18/518,461.
Application 18/518,461 is a continuation of application No. 16/900,555, filed on Jun. 12, 2020, granted, now 11,854,849.
Prior Publication US 2024/0087934 A1, Mar. 14, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H01L 21/677 (2006.01); B65G 1/04 (2006.01); B66C 13/23 (2006.01); B66C 13/48 (2006.01); B66C 19/00 (2006.01); B66F 9/18 (2006.01); H01L 21/67 (2006.01); B61B 3/00 (2006.01)
CPC H01L 21/67733 (2013.01) [B65G 1/0457 (2013.01); B66C 13/23 (2013.01); B66C 13/48 (2013.01); B66C 19/00 (2013.01); B66F 9/183 (2013.01); H01L 21/67259 (2013.01); H01L 21/67724 (2013.01); H01L 21/6773 (2013.01); H01L 21/67736 (2013.01); B61B 3/00 (2013.01); B65G 2201/0297 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for operating a conveying system, comprising:
positioning an overhead hoist transport (OHT) vehicle over a first load port;
transmitting a first data to the OHT vehicle, wherein the first data includes information of a weight of a first carrier, a number of workpieces in the first carrier, and a first vertical distance between the OHT vehicle and the first carrier;
applying a first lifting force to the first carrier on the first load port, wherein the first lifting force is determined based on the first data;
positioning the OHT vehicle over a second load port;
transmitting a second data to the OHT vehicle, wherein the second data includes information of a weight of a second carrier, a number of workpieces in the second carrier and a second vertical distance between the OHT vehicle and the second carrier; and
applying a second lifting force to the second carrier on the second load port, wherein the second lifting force is determined based on the second data, and the first lifting force is different from the second lifting force,
wherein the first lifting force is a minimum force required to lift the first carrier calculated by a control unit of the OHT vehicle, and the second lifting force is a minimum force required to lift the second carrier calculated by the control unit.