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Thin Film Antenna

 
2007 Aug 28th got film antenna patent No. US7261916B1
Why Thin Antenna?
  Thin film antenna have the largest cost reduction potential of all RFID tags.
  Thin film antenna has the lowest Cu consumption.
  There is no pollution duing manufacturing.
  The antenna performance is the same as FPC antenna.
 
Most developing hurdle:COST
  Passive tag is still too expensive
   
‧ The cost issue of passive tag is still the number one to be considered.
‧ The target price of Wal-Mart for passive tag is 2-5 cents which are much lower than the current selling price (around 30 cents).
‧ The cost of FPC antenna is around 7 cents which is almost the limit of FPC process.
‧ The cost of thin file antenna can be lower down to 1 cent for UHF RFID tag.
 

Systme specifications:
  Application : Single-side HF antenna and UHF antenna.
  Coating width : 40cm.
  Coating speed : 3 m/min.
  Coating material : Cu or AI.
  Film thickness : 3µm.

 
Competitive Analysis
  FPC antenna Conductive link antenna Thin film antenna
Manufacturing Process Complicated
(over than 20 steps)		 Simple Difficult,but not complicated
(only 3 steps)
Pollution Serious No No
RF performance Good Worse Good
Cost Expensive Expensive Very low
 
Antenna Specification
Frequency 900 - 925 MHz
Antenna Gain 1.5 dB
Return Loss ≦ - 10 dB
Surface Resistivity 3 x 10 - 8 Ω.m
Impedance Matching Gen 2 chip
Metal Layer Copper
Substrate PET
 
The Cheapest antenna manufacturing method for RFID tag
  Providing a substrate
  Pattenning an organic material layer
  Drying
  Forming a conductive layer
  Removing the organic material layer
 
Driver for RFID
  Wal-Mart will force all suppliers to use RFID,if they want to sell their goods to Wal-Mart.
  Replace Barcode
  Reduce logistics cost
 

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