US 11,791,183 B2
Method and apparatus for IC unit singulation and sorting
Jong Jae Jung, Singapore (SG); Yun Suk Shin, Singapore (SG); and Deok Chun Jang, Singapore (SG)
Assigned to Rokko Systems Pte Ltd, Singapore (SG)
Filed by Rokko Systems Pte Ltd, Singapore (SG)
Filed on Dec. 13, 2021, as Appl. No. 17/549,396.
Claims priority of application No. 10202012571R (SG), filed on Dec. 15, 2020.
Prior Publication US 2022/0189805 A1, Jun. 16, 2022
Int. Cl. H01L 21/06 (2006.01); B65G 47/90 (2006.01); H01L 21/67 (2006.01); B07C 5/02 (2006.01); B07C 5/34 (2006.01)
CPC H01L 21/67271 (2013.01) [B07C 5/02 (2013.01); B07C 5/34 (2013.01); B65G 47/90 (2013.01); B65G 2203/00 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A unit sorting system comprising:
a net table for receiving units and a unit lifter for depositing said units on the net table;
the net table having a first and second zone;
wherein the unit lifter is arranged to engage a batch of units and then deposit a first half of the batch to the first zone and deposit a second half of the batch to the second zone and each half batch of units is deposited in a checker board pattern in the respective zones; said checker board pattern configured to provide clearance about each of the units so as to avoid interference when a unit picker engages the units;
a unit picker assembly including said unit picker, wherein said unit picker is arranged to engage at least one of said units from the net table;
said net table including a buffer row;
a control system arranged to determine a number of shortfall units for an offloading row;
said unit picker arranged to engage the number of shortfall units from a periphery of the batch and place in the buffer row;
a gang pusher arranged to push the number of shortfall units in the buffer row into the offloading row.