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IC Assembly & Packaging
PROCESS AND TECHNOLOGY
Presented by:
Achmad Sholehuddin
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Achmad Sholehuddin
What is a semiconductor?
A semiconductor is a material that behaves in between a conductor and an insulator.
Examples of semiconductors include chemical elements and compounds such
as silicon, germanium, and gallium arsenide
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22 June 2007 Achmad Sholehuddin
SEMICONDUCTOR MANUFACTURING
Production of pure silicon
Wafer fabrication
Semiconductor
assembly packaging
Testing and packing
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Achmad Sholehuddin
Wafer Fabrication Process Flow
Incoming Wafers Epitaxy Diffusion Ion Implant
Polysilicon Dielectric Lithography/Etch
Thin Films Metallization Glassivation Probe/Trim
Finished wafer
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QFP
TAB
COB
CSP
FC
100%
44%
28%
13%
11%
Packaging Evolution
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Package Variation
Pre mold (cavity) package Leadless package
Power package BGA
Standard Leaded Other
PLCC T/L/M/QFP SOIC/QSOP PDIP
Thru hole pack Surface mount device
LID
BASE
Lead frame
Die
Metal package Exposed pad package
QFN package DFN package
Package
Die
Molded with exposed die SIP sensor
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Leaded Package
Ball Grid
Array
Flip Chip On
Board
(FCOB) Source: TechSearch International, Inc.
Flip Chip
Ball Grid
Array
Chip Size
Package
Chip Size
Package
Chip On Board
Progression in Packaging
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Communications / Wireless Computing
Consumer Power
IC Applications
Automotive Industrial
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22 June 2007 Achmad Sholehuddin
Front of Line Assembly Process Flow
Wafer back grind Wafer mount Wafer Saw
Die Attach Wire bond Die overcoat
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22 June 2007 Achmad Sholehuddin
Back End Assembly Process Flow
Molding Marking
DFTS
Deflash/form/trim/singulation
Lead finish
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Wafers
Majority material from Silicon
Some made by GaAs, Glass
Diameter: 4,5,6,8,12 inches
Original thickness: 25 and 29 mils
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Back Grinding
Process to thin down the wafer from original thickness to the required final thickness by abrasive grinding wheel in combination to mechanical/chemical polish
Common industries used wafer thickness 8-15 mils (200-300microns)
Current Machine capability 1.0 mil (25microns)
Challenge: ??
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Back Grinding
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Wafer Mount
Mount the wafer to mounting tape to prepare for wafer sawing process
Current technology can mount wafer as thin as 2.0 mils (50 microns)
Challenge: ???
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Wafer Mount
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Wafer Mount
Video
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Wafer Saw
Process of Singulation the IC to be individually separated by abrasive diamond blade or by laser cutting
Challenge:???
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Wafer Saw
Video
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Die Bonding
Bonding the individually singulated IC to substrate. Bonding material can be epoxy/glue to DAF tape
Challenge: ???
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Die Bonding
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Die Bonding
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Die Bonding
Video
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Flip Chip
Video
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Wire Bonding Process of interconnecting the IC to its substrate
through bonding wire
Each IC has bond pad that can transfer the circuit information to the designated lead that to be connected to board application
Challenge: ???
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Wire Bonding
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Wire bonding
Video
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Wire Bonding
Video
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Stacked Die
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Wire bonding
Video
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© UNISEM CONFIDENTIAL
MOLDING MACHINE PROSESS PENUTUPAN CHIP DENGAN THERMOSETTING
PLASTIK
• AUTO MOLD
• MANUAL MOLD
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© UNISEM CONFIDENTIAL
TIDAK ADA BANTUAN OPERATOR UNTUK MOLD
PROSESS DARI ON LOAD SAMPAI OFF LOAD
LEAD FRAME
PACKAGE:
- LEADED
- QFN
- BGA
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© UNISEM CONFIDENTIAL
MANUAL MOLD LEADED
OPERATOR MELETAKAN LEAD FRAME DAN MOLD
COMPOUND SECARA MANUAL DENGAN BANTUAN JIG
LEAD FRAME
PACKAGE:
- LEADED
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© UNISEM CONFIDENTIAL
PLATING MACHINE PROSESS PELAPISAN TIMAH PADA PERMUKAAN COPPER
• FULLY AUTO WITH CONVEYOR BELT
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© UNISEM CONFIDENTIAL
PACKAGE:
- LEADED
- QFN
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© UNISEM CONFIDENTIAL
MARKING MACHINE PROSESS PENAMAAN DARI UNIT DENGAN MEMBAKAR PERMUKAAN
MOLD COMPOUND MENGGUNAKAN LASER
• FULLY AUTO
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© UNISEM CONFIDENTIAL
PACKAGE:
- LEADED
- QFN
- BGA
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© UNISEM CONFIDENTIAL
TRIM AND FORM MACHINE PROSESS PEMBENTUKAN LEAD DAN PEMISAHAN UNIT DARI STRIP
• FULLY AUTO
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© UNISEM CONFIDENTIAL
PACKAGE:
- LEADED
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22 June 2007 Achmad Sholehuddin
Testing and Packing Process Flow
Testing Burn in Tape and reel
Dry packing Boxing and labeling
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1/24/11 © 2011 UNISEM CONFIDENTIAL 40
Thank You