芯片制造流程
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1. ELECTRICAL INTERCONNECTION 2. MECHANICAL SUPPORT/HANDLING/SOLDERING
3. PHYSICAL/CHEMICAL/RADIATION PROTECTION //
4. POWER DISSIPATION
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Deflashing
Operation : Aim :
To remove resin flashes from the slug
To ensure good thermal conductivity of the power package and good surface finish
Cropping
How to assemble the dice ?
EG.TO220 PROCESS FLOW TO220
Wafer Mount Wafer Saw
Die Attach
Wire Bond
Molding
Packing
Test/Mark
Solder Dip
Cropping Deflashing
Wafer Mount
Aim :
To provide physical and ESD protection during handling and transportation
Aim :
To ensure electrical function of devices, correct salestype, to mark with salestype, ST logo and traceability code
Packing
Operation : To pack the devices into tube and then the inner box
Die Attach
Operation : Aim :
To attach the die to the leadframe
To fix the die for future wire connecting,for electrical and thermal conductivity.
Wire Bond
Operation : Bonding wires on the die and on the package leads.
Aim :
To connect the bonding pads on the die to lead tips of the leadframe, to electrically link the die with external
To enhance lead solderability (easier mounting on PCB) and increase corrosion resistance
Test / Mark /
Operation : To test and classify devices & laser engraving on the mold compound
Operation : To stick wafer on adhesive tape
Aim :
To sustain and hold the wafer during sawing and then the dice after sawing
Wafer Saw
Operation : Aim :
Sawing of the wafers through the scribe streets To separate the dice
Molding
Operation : To encapsulate the frame and the bonded dice in a mold compound
Aim :
To protect the die and its bonding wires from external physical/chemical damage
Operation : Aim :
To singulate each unit from strip
To deliver products that can be mounted and soldered on PCB
Solder Dip
OperatiLeabharlann n : Aim ::Deposition of a lead tin alloy over the leads