March 4-7, 2018 Hilton Phoenix / Mesa Hotel Mesa, Arizona Archive 2018 BiT Workshop Image: pilgrims49 / itock
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More than You Think: The Beauty of Coaxial ocket Collins un, Ryan Chen, Hayden Chen WinWay Technology Co., Ltd. Conference Ready mm/dd/2014 BiT Workshop March 4-7, 2018
Contents Why Choose Coaxial? Brownie Coaxial ocket tructure Brownie Coaxial Applications ummary 2
Why Choose Coaxial? Coaxial Cable Plastic Jacket Metallic hield Dielectric Insulator Center Core RCA Connector Television Coaxial Cable uperior ignal Protection Low Transmission Loss Anti-interference Ability MA Connector BNC Connector 3
Brownie Coaxial ocket tructure Through-hole Coaxial ocket Design Coaxial Cable Innovation Features Through-hole Design Excellent Impedance Control Composite Insulation Materials uperior Reliability for Mass Production ( >1M ) Fully Metal hielding Perfect ignal Protection urface Insulation Avoid horting Risk Brownie Coaxial ocket * Patented Product * Mix Pin Configuration Higher Current Capacity 4
Insertion Loss, db Return Loss, db Brownie Coaxial ocket tructure What is the advantage of through-hole design? Impedance Continuity Through-hole Design Discontinuous Pin Hole -10dB over 50 GHz Discontinuous Pin Hole Through-Hole Design Why should coaxial housing have grounding design? High Frequency Behavior Three grounding designs show distinguishable insertion loss behavior at higher frequency >30GHz. Discrepancy at high frequency range. V1 V2 V3 5
Brownie Coaxial Applications Electrical WiGig IoT High Data Rate : 56Gbps Fully Metal hielding : Crosstalk Reduction Adjustable Impedance Control Good Current Capacity Thermal Coaxial ocket A.I. Mechanical uitable for Large Package ize >65X65mm 2 Excellent Reliability >1M Insulation Coating and Composite Good Thermal Conduction : - 40 ~ 125 Data Center Automotive Next Generation Processor CPU / GPU / FPGA / NPU 6
Digital data rate (Gb/s) Brownie Coaxial Applications erdes 56Gb/s Thunderbolt3 40Gb/s erdes 32Gb/s DisplayPort1.4 32Gb/s HDMI2.0 18Gb/s HDMI2.1 48Gb/s ATA Express 16Gb/s PCIE4 16Gb/s PCIE5 32Gb/s GDDR6 16Gb/s GDDR5 7Gb/s LPDDR4(X) 4.2Gb/s LPDDR5 6.4Gb/s Brownie Coaxial ocket 2016 2017 2018 2019 2020 7
W W W The Crosstalk Issue on Testing G 81G (ignal to Ground Probes Ratio) Plastic ocket DDR-4266Mbps IBI model Eye height : 1.09 Eye width : 215.00 Eye Jitter RM : 3.23 Brownie Coaxial DDR-4266Mbps IBI model Eye height : 1.15 Eye width : 225.89 Eye Jitter RM : 1.42 Eye ource 56Gbps data rate pure eye source 56Gbps data rate pure eye source Eye height : NA Eye height : 1.04 Eye Probe GND Eye width : 0.41 Eye Jitter RM : 2.57 Eye width : 17.45 Eye Jitter RM : 0.07 8
NEXT, db The Crosstalk Issue on Testing Example Pin Map chematic Plastic ocket Brownie Coaxial P G G P P G G G G G G The coupling between signals is very strong and it brings crosstalk issue. There is no interference between two signals due to fully shielding design. Brownie Plastic Crosstalk Comparison of GG 9
Insertion Loss, db Insertion Loss, db Return Loss, db Return Loss, db Perfect hielding Design DUT Pin Map chematic Plastic ocket Brownie Coaxial 3 G G 1 G 2 G 1 2 3 4 Consistency 1 2 3 4 G G 4 As shown, the performance of plastic socket -1 db -1 db highly depends on DUT pin map arrangement. Low Insertion Loss In contrast, coaxial socket provides better consistency and impedance matching. 10
Actual High peed Test Results Test olution Plastic ocket Brownie Coaxial P G P Test speed (Gb/s) TX RX TX RX G TX_P G G TX_N G P G P 20 G RX_P G G RX_N G 25 Device pitch : 1.0mm Test requirement : 30Gb/s Application : Data Center 30 In test speed 30Gb/s, the eye height of Brownie coaxial(~1000mv) is twice than plastic socket(~500mv). 11
Mechanical Analysis imulation Condition ummary Mounting Plate Total Pre-Load Force : 20Kg Pin Counts : ~1,300 To fulfill the large package application >65*65mm 2, coaxial socket can suppress the housing warpage without losing electrical performance. 140mm 140mm Plastic ocket Brownie Coaxial Center Warpage ~0.3mm Center Warpage ~0.018mm Package ize : 75*60mm 2 Pin Counts : ~4000 Device Pitch : 1.0mm 12
Thermal ocket Application Cold / Hot ource Cold / Hot ource ( - 40 to 125 ) Contact Chuck Docking Plate Docking Plate ummary Cover For the thermal socket application, coaxial Insert structure not only reduces the crosstalk Top ocket between signal pins, but also achieves the Thermal Couple oc DUT Bottom ocket thermal application from - 40 to 125. 13
High peed olution Comparison pring Probe ocket Rolling Contact Elastomer Pros Good for Production High Current Capacity hort Electrical Length Excellent Electrical Performance Pros Cons Poor Thermal Conduction Crosstalk Issue horter Contact Travel Not uitable for Production horter Contact Travel Coaxial ocket 1. Adjustable Impedance 2. Excellent hielding 3. uit for All Package Types, also Large Package 4. Thermal Application pring Probe ocket Rolling Contact Elastomer Coaxial ocket 14
Final Test ummary Wafer Test Pitch(mm) 0.8 0.65 0.5 0.4 0.30 0.2 Design ready Release X Production X : Finished : On-going X : TBD Through-hole Design Composite Insulation Materials with Low Dielectric Loss Fully Metal hielding urface Insulation Mix Pin Configuration 15 Coaxial ocket
Return Loss, db Return Loss, db Future Goals In order to expand the applicability of Brownie coaxial, higher bandwidth up to 80GHz, and fine pitch solution down to pitch 0.2mm are also developing for the advance testing requirement in the future. Next Coaxial Generation Wafer Test -10 db -10 db New Development Existing Design 5 th Gen WiGig Automotive Pitch 0.2mm Pitch 0.3mm 16