UHF RFID for Wafer Carrier Tracking
UHF RFID

UHF RF ID for Wafer Carrier Tracking

 

Wafer carrier tracking system is not innovated for decades. Barcode label and Infrared(IR) system are both old technology and have his own limitation.

Barcode

Ÿ  Need matched position

Ÿ  Failure of surface scratch/hazing

Ÿ  Low automation level

 

IR

  • Expensive
  • Need precise location for infrared
  • Slow data transit
  • Battery life time concern

 

Glass type LF RF ID has introduced to semiconductor since mid 90s but can not be popular used till SEMI put it as the standard for 300mm wafer carrier tracking system. However it cannot be popular used as following reasons.

 

 
  • <150mm reading distance
  • Poor anti-inference
  • Need holder to mount in wafer carriers

 

Ruizhang Technology and Rosefinch Tech work with semiconductor customers and OEMs to design special UHF RF ID for wafer carrier tracking application.

 

  • 450mm reading distance for easy selection of tag location
  • Front reading range only to prevent multiple tags reading
  • Smaller antenna size for easy installation
  • Welding , screw or glue mounting for customers
  • High temp option

 

RF ID comparison

 

Low Frequency

High Frequency

Ultra High Frequency

Frequency

134.2k HZ

13.56M HZ

865-928 M HZ

Typical Tag Type

32mm glass tag

83x54mm

83x54mm

Reading Range

<10cm

10-15Cm

>0.5M

Data transmission speed

Slow

Medium

Fast

Power – output

>1W

30dBm（1W）

20dBm（100mW）

Power - input

12V，1A

12V，1A

5V/3.3V

Multiple reads capability

Single only

Good

Excellent

Tag memory

32-256 bits

256 - 8K bits

96 - 1K bits

Anti-interference

Poor

Not good

Better