Subcontracting and company selection

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Presentation transcript:

Subcontracting and company selection TE-MPE-EM WORKSHOP Subcontracting and company selection Raphaël Berberat June 16, 2016

Content MPE-EM Procurement structure PCB procurement PCB manufacturer selection Electronic Assembly procurement Electronic Assembly subcontractor selection We keep in touch Questions Raphaël Berberat

MPE-EM Procurement structure Planning Coordination Outsourced assembly for electronic boards Components suppliers Clients PCB procurement Harness subcontractors Mechanical subcontractors via EN-MME Subcontracting team Raphaël Berberat

PCB procurement analysis From 01.06.2015 to 31.05.2016 DAI issued: 247 Total cost: 624’835.- CHF DAI < 5'000.-CHF: 229 DAI > 5'000.- and <10'000.-CHF: 11 DAI > 10'000.-CHF: 7 Most expensive DAI: 33'000.- CHF Average cost per DAI: 2'530.- CHF Raphaël Berberat

PCB procurement strategy The PCB is the most critical part of an assembly if it fails, the whole board is scrapped An income inspection cannot detect the defects Several process steps can be considered as special process in terms of QA Most of the PCB ordered are similar in terms of technology A pricing model is easy to establish, based on layer count, size, density, leadtime, material, batch size Raphaël Berberat

PCB procurement strategy MS based on IPC-1710A standard and IT launched in 2013-2014 89 companies listed for the MS 23 answers received 9 preselected on the basis of the technical questionnaire of the MS and visited for a technical audit 7 qualified for the IT Final adjudication with 2 contracts to the 2 lowest bidders. Advantage of the contact: orders <5k are managed as small orders by purchasing office (instead of <1k) With the pricing model, no bad surprise, the costs remain under control We have the guarantee for 3 years of the lowest prices for the quality and leadtime required & The companies validated during the IT phase represent an alternative to keep the pressure on Price, Quality and Leadtimes Raphaël Berberat

PCB procurement strategy In parallel with the contracts, some production is given to EP-DT-EF: Low volume or prototypes Fast Track production Specific design Process validation In order to maintain in this section the minimum load to keep the basic process under control Raphaël Berberat

How to select a PCB manufacturer General requirements ISO 9001:2008 certified company Production shall be done in CERN Member States All process steps shall be done in-house, no subcontracting allowed Halogen free base material shall be used  IS41, CERN standard Acceptance of the PCB shall be compliant with IPC-A-600 standards Controlled impedances Finished holes diameter: down to 0.2 mm, aspect ratio to 8:1 Blind and buried via holes according to IPC-DR-572 Surface finishing: electroplated Au, Ni/Au electroless Raphaël Berberat

How to select a PCB manufacturer Specific requirements The firm shall have a cold room for the stock of base material The firm shall have a chemical laboratory measurement (at least every day) of the concentration of all liquids used in the humid chemistry process. A database shall be updated each day with the measured values and the corrective parameter change. The firm shall insert test coupon in the normal production to be able to make micro-section on these sample during the day. The firm shall perform an electrical test to the final product with a test programm generated from customer file and not from their own files they generated and used for production Raphaël Berberat

How to select a PCB manufacturer 2 specific points to make the difference Copper plating Critical point due to thermal expension of base material during reflow process Holes plating is critical during PCB manufacturing, max ratio recommended 8:1  Fatal issue Surface finishing ENIG finition is our standard Critical point due to chemical process in humid chemistry. It is mandatory to check these 2 points during audit Raphaël Berberat

PCB specification The first step to get quality at the end is to properly define the requirements in the beginning Each PCB designed by MPE-EM is specified according to IPC-2220 series standards Each PCB managed by MPE-EM design office is documented into EDMS Gerber files are not sufficient to define a PCB and the required quality Raphaël Berberat

PCB procurement validation For multilayer PCB, a micro section report and test coupon is part of the deliverables for each order Raphaël Berberat

And for electronic assemblies?

Assembly procurement analysis From 1st of June 2015 to 31st of Mai 2016 Number of DAI issued for electronic assembly: 242 Total cost: 786'114.- CHF DAI < 5'000.-CHF: 216 DAI > 5'000.-<10'000.-CHF: 19 DAI > 10'000.-CHF: 7 Most expensive DAI: 77'346.- CHF Average cost per DAI: 3'248.- CHF Raphaël Berberat

Electronic assembly procurement strategy The boards to be mounted can be split into several categories Simple: through hole components, low density Intermediate: Through hole and simple SMD components Complex: BGA, QFN, LGA Each category has its assembly requirements, leading to different installed processes A firm equipped for complex boards will not be competitive for simple ones Urgent projects often require proximity with the firm An open contract requires a pricing model to guarantee the best cost at any time for any project. For assembly, a price model is not easy to establish Raphaël Berberat

Electronic assembly procurement strategy No contract signed between CERN and Assembler 10 - 12 validated company and under control Validation of the firm through a technical audit on production site On the basis of a specification defining CERN general requirement Periodic follow-up audits to prevent bad surprises Constant survey to keep contact with the market and stay up-to-date with the necessary processes Technical specification for assembly MPE-EM created 2 documents to specify its general requiments Specification for reflow thermal profile to be used as a function of the components to be mounted Raphaël Berberat

How to select an EMS (Electronics Manufacturing Services) General requirements ISO 9001:2008 certified company Production shall be done in CERN member states All steps of process shall be done in-house, no subcontracting allowed Acceptance of the electronic assemblies shall be compliant with IPC-A-610 standard, class 3 Class 1 -- General Electronic Products Includes products suitable for applications where the major requirement is function of the completed assembly. Class 2 -- Dedicated Service Electronic Products Includes products where continued performance and extended life is required, and for which uninterrupted service is desired but not critical. Typically the end-use environment would not cause failures. Class 3 -- High Performance Electronic Products Includes products where continued high performance or performance-on-demand is critical, equipment downtime cannot be tolerated, end-use environment may be uncommonly harsh, and the equipment must function when required, such as life support or other critical systems. Industrial cleaning equipment in house Vapor phase oven may be an advantage Raphaël Berberat

How to select an EMS (Electronics Manufacturing Services) 3 specific points to make the difference ESD equipment shall be deployed in the complete production area ESD tester and records of each tests done per employee ESD personnal equipment for each collaborator ESD personnal equipment for each visitor Thermal profiling for BGA/LGA component A thermal profiler with minimum 4 thermal couplers shall be present in the firm The thermal profiler shall be qualified on maximum annual basis Thermal measurement before production Vapour phase oven may be a real advantage for complex assemblies Industrial cleaning equipment Aqueouse or solvent basis Maintenance of this system shall be carefully defined and respected Raphaël Berberat

Assembly procurement specification REFERENCE STANDARDS - IPC/JEDEC J-STD-001 Requirements for soldered electrical and electronic assemblies - IPC-A-610 Acceptability of electronic assemblies - ANSI/ASQ Z1.4-2003 Sampling procedures and tables for inspection by attributes - IPC/JEDEC J-STD-609 Marking and labeling of components, PCBs and PCBAs, to identify lead (Pb), lead free and other attributes - ANSI/ESD-S-20.20 Protection of electrical and electronic parts, assemblies and equipments - IPC/JEDEC J-STD-033 Handling, packing, shipping and use of moisture/reflow sensitive surface mount devices Raphaël Berberat

Assembly parameter validation Before the production MPE-EM shall validate 2 documents to be provided by the firm: The process chart that will be used during the manufacturing of the assemblies Even if NoCLEAN fluxes are used, an industrial cleaning process is mandatory Attention should be paid to non-cleanable components The temperature profile measured on a representative board After production and with the parts, the firm shall provide a quality report including : Non-conformities found during the production setup (false or bad documents, missing components, design errors, etc) Non-conformities found during the production quality controls and the related corrective actions that have been taken Raphaël Berberat

Excel files Our tools ≠ GPAO Access database 1st of June 2016: 85 jobs announced 166 jobs running We are near the limits of our tools and a real GPAO may be needed in the futur Raphaël Berberat

Customer dedicated application We keep in touch With our “consultation client” application \\cern.ch\dfs\Services\Electronics\DEM\Public\Consultation_client Raphaël Berberat

Questions?