Package Trends for Mobile Device
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1 Package Trends for Mobile Device On-package EMI Shield At CTEA Symposium Feb-10, 2015 Tatsuya Kawamura Marketing, Director TEL NEXX, Inc.
2 Love Thinner Mobile? iphone is registered trademarks of Apple Inc.
3 Outline Evolution of EMI shielding technology Advantage of PVD for on-package EMI shield TEL NEXX technologies PVD process solution Summary
4 Package Height Roadmap Oh Li, ASE Group, SEMICON West Package trends towards smaller implementation size and height, One of next steps moving to EMI Shield Design for Packages
5 EMI Shielding Trends, Packaging Technology Dr. Harrison Chang, Vincent Chen, USI at SEMICON West 2013, Edited Older Metal Can Shields may not always be the Answer
6 EMI Shielding Trends, Packaging Technology Example Considering Discussions for Mobile Device Noise is Wideband, and Shielded Package Reduces Interference for EMC Compartmentalization Limit Resonance to Higher Frequencies Affect Shielding Effectiveness The Conductivity of Shielding Material and Shielding Thickness. The Grounding of the Shielding Structure Shifting to Package level of EMI Shield Keys [Conductivity of Material and thickness] [Grounding structure] Dr. Harrison Chang, Vincent Chen, USI at SEMICON West 2013, Edited
7 EMI Shielding Trends, Packaging Technology PCB space savings with RFMD s MicroShield Source : Thinner system assembly with EMI shield on package Design Layout Flexibility on Mobile Main PCB
8 iphone 6 Teardown Multiple on-package EMI shield launched down/29213 iphone is registered trademarks of Apple Inc.
9 EMI Package Metal Shield Process Methods Plating Spray PVD Pros Common process for Plastics Smaller product Relatively low cost product Controllability Low film resistivity Less Process Steps Cons Product Masking Large product footprint Initial facility cost Product Masking Thickness variation High cost of material Less Sidewall Coverage Adhesion to plastics Backside deposition Manufacturers are always looking for the Best Technology & Economic Solution
10 EMI Shield Package Outlook Motivation with Mobile Thinner package fabrication Local noise interference reduction due to higher & several frequency device mix Packages and EMI methods Wi-Fi/BT, GPS RF, Memory Application processor Plating / Painting method shifts to PVD PVD advantages Better film properties Lower Cost of Ownership
11 TEL NEXX Company Overview Products Target Markets Deposition equipment for advanced packaging (ECD & PVD) High-end semiconductors used primarily in mobile devices; LEDs Location Support Billerica, Massachusetts Worldwide Offices: China, Taiwan, Korea, Japan, Singapore, Europe Products Applications Stratus (ECD) Electrochemical Deposition Apollo (PVD) Physical Vapor Deposition Stud or Pillar Bump Under Bump Backside Metal LED Contacts
12 TEL NEXX Products for Advanced Packaging Wet and Dry Metal Deposition Stratus Electrodeposition (ECD) Apollo Physical Vapor Deposition (PVD) PHOTORESIST DEVELOP ELECTROPLATE ETCH REFLOW DICE Apollo Stratus Apollo Apollo UNDER BUMP METALLIZATION LITHOGRAPHY CLEAN STRIP INSPECTION BACKSIDE METALLIZATION NEXX Products INTEGRATE EMI SHIELD DEPOSITION TEL NEXX has expanded its Advanced Packaging Offering 12
13 EMI Package Metal Shield Requirements Shielding performance Highly Conductive Metal Film Package Substrate Noise Flow EMI Shield on Package Laser Mark Visibility Adhesion to Package Grounding System Substrate Side Wall Coverage Long Life Low Resistance to GND Reliable Low Cost Protect Backside Contact Control Process Temperature Figure source : Toshiba Review Vol.67 No , Edited
14 EMI Shielding PVD Process Flow Seq. Operation Key Process Inputs Impact on Process Output 1 Load Package Placement Electrical Performance Sidewall Coverage Appearance 2 Degas Temp Time Cool Time Base Pressure Package Temperature Adhesion Electrical Performance 3 Pretreatment Time RF Power Process Gas Flow Base Pressure Package Temperature Adhesion Electrical Performance 4 Deposition Power Time Process Gas Flow Base Pressure Package Temperature Adhesion Electrical Performance Sidewall Coverage Metal Thickness 5 Unload Package Placement Safety Contamination
15 Trials for EMI Shield on Package Package : Coated with EMI shield + Corrosion barrier by PVD(Apollo) Package : Post Cut & Tape test Tape : Post Cut & Tape test PVD EMI shield film/corrosion barrier shows excellent adhesion to various commercial package surfaces
16 Summary EMI Shielded package can be a solution towards thinner implementation for Mobile devices Wi-Fi/BT modules, PA modules and Memory inside the latest high-end mobile were fabricated onpackage EMI Shielding PVD is one of the better solution for on-package EMI Shielding
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