Issue link: https://iconnect007.uberflip.com/i/1355791
REAL TIME WITH... IPC APEX EXPO 2021 SHOW & TELL MAGAZINE I I-CONNECT007 87 years on investigating the WMI. Jerry summa- rizes all the results to date and provides rec- ommendations for containment and further experimentation. SO5-3: William Bower- man, MacDermid Alpha Elec- tronics Solutions, "Process Improvement Strategies for Weak Microvia Interfaces." Bill discusses the results of a two-Level DOE experimen- tation on the metallization process for stacked blind microvias tested to IPC test methods 2.6.26A and 2.6.27. e well documented paper concludes that proper tar- get pad preparations and cleaning of lasered via are essential. Best practices must be fol- lowed for electroless copper deposition to gain copper recrystallization across the interface. SO8-1: Maartin Cauwe, IMEC/ESA, "Microvia IPC/ E S A T V I n t r o d u c t i o n ." Maartin recapped the HDI qualification program for the European Space Agency carried out over the last two years. is was done in two phases: a basic HDI architecture and a complex HDI structure, utilizing two materials, rigid polyamide glass, and Panasonic MEGTRON 6. Working with IPC, a high-performance FR-4 was also tested: Hitachi 679F(j) using a 26-layer TV with four-different test coupons to be tested to IPC to 2.6.7.2C, 2.6.26A-method A, 2.6.26A-method B and 2.6.27B. Test results are presented in three papers. SO8-2: Bob Neves, Microtek Labs China, "IPC/IMEC/ ESA Microvia TV HATS 2 Test Results." Bob intro- duced the HATS2 test vehicle and testing strategy. is is a "single via coupon" used by automotive to detect onset of microvia failure. Also tested were the IPC "D" coupon daisy chains. All used a maximum of 230°C reflow temperature for the tin-lead assembly process of the ESA. All coupons per- formed well with the staggered via structures outperforming the stacked via structures. e final report is 160 pages long! SO8-3: Jason Furlong , PWB Interconnect Solutions, "IPC/IMEC/ESA Microvia TV IST Test Results." Jason described in detail the Test Vehicle coupons for IST test- ing and the test equipment. No failures occurred in this standard testing, but six coupons were selected for continuous extended testing to 5% fail at 190°C. Testing continues today. SO8-4: Kevin Knadle, TTM Technologies, "IPC/IMEC/ ESA Microvia CITC Test Results." Kevin introduced the CITC Coupon developed by IBM, a small, simple, sin- gle-net of vias in-line. Results were excellent with the stag- gered microvias outperforming semi-stacked and full stacked, from maximum reflow temps of 230°C, 245°C and 260°C. Kevin provided Life Reliability calculations. Technical Track: Factory of the Future Implementation S10-1: Barry Maybank, MTC, "MTC Vision Strategy and Digital Journey Imple- menting IPC CFX Using Legacy Equipment." In this presentation, Barry Maybank explains the background of the MTC, one of seven high- value-manufacturing technology catapult cen- ters established in the UK. e other six are: • Advanced Forming Research Centre (AFRC) • Centre for Process Innovation (CPI) • Nuclear Advanced Manufacturing Research Centre (NAMRC) William Bowerman Maartin Cauwe Bob Neves Jason Furlong Kevin Knadle Barry Maybank