--- title: Epec's Blog | Jim Marsh description: Jim Marsh has been with Epec Engineered Technologies for over 12 years. Jim is the CAM/CAD Engineer-FLEX Specialist (CCEF) and has extensive knowledge in manufacturing design software. He works directly with the Flex and Rigid-Flex product manager to review designs, quote requests, and help customers early in development prior to manufacturing. The technical support provided to production by Jim contributes to Epec’s continuous growth. --- [![Epec Engineered Technologies](https://www.epectec.com/images/logo.png "Epec Engineered Technologies")](https://www.epectec.com/) [![Epec Engineered Technologies](https://www.epectec.com/images/logo.png "Epec Engineered Technologies")](https://www.epectec.com/) - [Articles](https://www.epectec.com/articles/) - [Blog](https://blog.epectec.com/) - [Webinars](https://www.epectec.com/webinar/) - [Videos](https://www.epectec.com/videos/) - [Case Studies](https://www.epectec.com/case-studies/) - [News & Events](https://www.epectec.com/news/) - [Customer Portal](https://system.netsuite.com/c.406760/site/NSlogin.html) - [About](https://www.epectec.com/about/overview/) - Back - [Company Overview](https://www.epectec.com/about/overview/) - [Our History](https://www.epectec.com/about/our-history/) - [Culture](https://www.epectec.com/about/culture/) - [Industries Served](https://www.epectec.com/about/industry/) - [Acquisitions](https://www.epectec.com/about/acquisitions.html) - [Operations](https://www.epectec.com/operations/) - Back - [Operational Excellence](https://www.epectec.com/operations/) - [Quality Philosophy](https://www.epectec.com/operations/quality-philosophy.html) - [Quality Assurance Process](https://www.epectec.com/operations/quality-assurance-process.html) - [Global Operations](https://www.epectec.com/operations/global-operations.html) - [Logistics & Supply Chain](https://www.epectec.com/operations/logistics-and-supply-chain.html) - [Inventory Stocking](https://www.epectec.com/operations/inventory-stocking.html) - [Approvals](https://www.epectec.com/operations/approvals.html) - [ITAR Registered](https://www.epectec.com/operations/itar-registered.html) - [Engineering](https://www.epectec.com/engineering/overview/) - Back - [Engineering Overview](https://www.epectec.com/engineering/overview/) - [Engineering Support](https://www.epectec.com/engineering/support/) - [Design Services](https://www.epectec.com/engineering/design-services/) - [EpecDFx™](https://www.epectec.com/engineering/epecdfx/) - [Free DFM File Check](https://www.epectec.com/engineering/free-dfm.html) - [PCB Impedance Calculator](https://www.epectec.com/engineering/impedance-calculator.html) - [Products](https://www.epectec.com/products/) - Back - [Overview](https://www.epectec.com/products/) - [Battery Packs](https://www.epectec.com/batteries/) - [Flex & Rigid-Flex PCBS](https://www.epectec.com/flex/) - [Cable Assemblies](https://www.epectec.com/cable-assemblies/) - [Printed Circuit Boards](https://www.epectec.com/pcb/) - [CNC Machining](https://www.epectec.com/cnc-machining/) - [User Interfaces](https://www.epectec.com/user-interfaces/) - [Flexible Heaters](https://www.epectec.com/flexible-heaters/) - [EC Fans & Motors](https://www.epectec.com/fans-motors/) - [Design Guides](https://www.epectec.com/guides/) - [Design Guides](https://www.epectec.com/guides/) - Back - Resources - Back - [Articles](https://www.epectec.com/articles/) - [Blog](https://blog.epectec.com/) - [Webinars](https://www.epectec.com/webinar/) - [Videos](https://www.epectec.com/videos/) - [Case Studies](https://www.epectec.com/case-studies/) - [News & Events](https://www.epectec.com/news/) - [Customer Portal](https://system.netsuite.com/c.406760/site/NSlogin.html) - [Contact Us](https://www.epectec.com/contact/) - Back - [Contact Information](https://www.epectec.com/contact/) - [Our Sales Team](https://www.epectec.com/contact/our-sales-team.html) - [Office Locations](https://www.epectec.com/contact/office-locations.html) - [Career Opportunities](https://www.epectec.com/contact/career-opportunities.html) - [InstantPCB*Quote*™](https://www.epectec.com/instantpcbquote/) - Back - [Overview](https://www.epectec.com/instantpcbquote/) - [Login](https://secure.epecpcb.com/epec/) - [Register](https://secure.epecpcb.com/epec/index2.jsp) - [Home](https://www.epectec.com/) - [Blog](https://blog.epectec.com/) - Jim Marsh Share This Page: [LinkedIn](https://blog.epectec.com/#linkedin) [X](https://blog.epectec.com/#x) [Facebook](https://blog.epectec.com/#facebook) [Email](https://blog.epectec.com/#email) # Epec's Blog | Electronics Manufacturing Solutions ![Jim Marsh](https://blog.epectec.com/hubfs/Blog-Authors/jim-marsh.jpg "Jim Marsh") ## Jim Marsh Jim Marsh has been with Epec Engineered Technologies for over 12 years. Jim is the CAM/CAD Engineer-FLEX Specialist (CCEF) and has extensive knowledge in manufacturing design software. He works directly with the Flex and Rigid-Flex product manager to review designs, quote requests, and help customers early in development prior to manufacturing. The technical support provided to production by Jim contributes to Epec’s continuous growth. ### Recent Posts --- ## [How to Specify Dielectric Call-outs in Your PCB Design](https://blog.epectec.com/how-to-specify-dielectric-call-outs-in-your-pcb-design) [![Example of common prepregs used in PCB manufacturing.](https://blog.epectec.com/hubfs/blog/prepreg-data-table.jpg "Example of common prepregs used in PCB manufacturing.")](https://blog.epectec.com/how-to-specify-dielectric-call-outs-in-your-pcb-design) Written by [Jim Marsh](https://blog.epectec.com/author/jim-marsh) Posted on January 13, 2021 at 9:19 AM - [Tweet](https://twitter.com/share) As [printed circuit boards](https://www.epectec.com/pcb/) (PCBs) progressed, requiring their functions to be more and more complex and diverse, the number of layers increased from 1-2 layers, up to 4-30 layers, with 4-12-layer boards being more typical. [Read More  ](https://blog.epectec.com/how-to-specify-dielectric-call-outs-in-your-pcb-design) --- ## [PCB Tolerances for Routing, Drilling, and Chemical Plating](https://blog.epectec.com/pcb-tolerances-for-routing-drilling-and-chemical-plating) [![Example of a CNC drilling machine](https://blog.epectec.com/hubfs/blog/cnc-drilling-machine.jpg "Example of a CNC drilling machine")](https://blog.epectec.com/pcb-tolerances-for-routing-drilling-and-chemical-plating) Written by [Jim Marsh](https://blog.epectec.com/author/jim-marsh) Posted on June 24, 2020 at 9:42 AM - [Tweet](https://twitter.com/share) Having been involved in the [printed circuit board (PCB)](https://www.epectec.com/pcb/) world for nearly four decades, I continue to see the same drawing mistakes. When declaring PCB tolerances in any given design, the PCB designer must take into consideration the manufacturing of the board itself. In this blog post, we will review some of the issues we commonly see in PCB designs that are not allowing the proper tolerances for the routing, drilling, and plating processes. [Read More  ](https://blog.epectec.com/pcb-tolerances-for-routing-drilling-and-chemical-plating) --- ## [Minimum Flexible PCB Specifications Needed for an Accurate Quote](https://blog.epectec.com/minimum-flexible-pcb-specifications-needed-for-an-accurate-quote) [![Example of a flexible PCB stackup using polyimide stiffeners.](https://blog.epectec.com/hubfs/blog/flexible-circuit-boards-in-modified-array-with-rolled-annealed-copper.jpg "Example of a flexible PCB stackup using polyimide stiffeners.")](https://blog.epectec.com/minimum-flexible-pcb-specifications-needed-for-an-accurate-quote) Written by [Jim Marsh](https://blog.epectec.com/author/jim-marsh) Posted on March 20, 2020 at 10:43 AM - [Tweet](https://twitter.com/share) In the rigid [printed circuit board (PCB)](https://www.epectec.com/pcb/) world, you can easily generate a quote with cookie cutter specs, such as 0.062” thick, with FR4, green soldermask, and white silkscreen. With those standard specifications, you could quote a huge number of rigid PCBs. [Read More  ](https://blog.epectec.com/minimum-flexible-pcb-specifications-needed-for-an-accurate-quote) --- ## [How To Design PCBs - Engineering Advice on Details](https://blog.epectec.com/how-to-design-pcbs-engineering-advice-on-details) [![Automated PCB Plating Lines](https://blog.epectec.com/hubfs/Blog/automated-pcb-plating-lines.jpg "Automated PCB Plating Lines")](https://blog.epectec.com/how-to-design-pcbs-engineering-advice-on-details) Written by [Jim Marsh](https://blog.epectec.com/author/jim-marsh) Posted on June 19, 2018 at 2:04 PM - [Tweet](https://twitter.com/share) In front-end engineering, we must gather as much manufacturing information as possible from the [printed circuit board data](http://www.epectec.com/pcb/data-requirements.html) we receive. This includes customer service notes, customer emails, and the general spec, if available. Usually there is enough information to release a printed circuit board (PCB) package to manufacturing. However, I have found many gray areas that haunt our engineering department. [Read More  ](https://blog.epectec.com/how-to-design-pcbs-engineering-advice-on-details) --- ## [Combining PCB Surface Finishes on External PCB Layers](https://blog.epectec.com/combining-pcb-surface-finishes-on-external-pcb-layers) [![PCB manufactured with hard gold surface finish](https://blog.epectec.com/hubfs/Blog/pcbs-manufactured-with-hard-gold-surface-finish.jpg "PCB manufactured with hard gold surface finish")](https://blog.epectec.com/combining-pcb-surface-finishes-on-external-pcb-layers) Written by [Jim Marsh](https://blog.epectec.com/author/jim-marsh) Posted on February 26, 2018 at 11:05 AM - [Tweet](https://twitter.com/share) The reason [printed circuit boards (PCBs)](https://www.epectec.com/pcb/) require a surface finish rather than being left as simply bare copper is because while copper is an excellent conductor, leaving it exposed will cause it to oxidize and deteriorate over time. The increased exposure will cause the PCB to fail much sooner than expected. [Read More  ](https://blog.epectec.com/combining-pcb-surface-finishes-on-external-pcb-layers) [All posts](https://blog.epectec.com/all) --- ### Recent Posts --- ### Posts by Topic - [Printed Circuit Boards (160)](https://blog.epectec.com/topic/printed-circuit-boards) - [Product Design (137)](https://blog.epectec.com/topic/product-design) - [Battery Packs (121)](https://blog.epectec.com/topic/battery-packs) - [Cable Assemblies (101)](https://blog.epectec.com/topic/cable-assemblies) - [Flex & Rigid-Flex PCB's (95)](https://blog.epectec.com/topic/flex-rigid-flex-pcbs) - [Electronics Industry (61)](https://blog.epectec.com/topic/electronics-industry) - [User Interfaces (55)](https://blog.epectec.com/topic/user-interfaces) - [Quality Solutions (33)](https://blog.epectec.com/topic/quality-solutions) - [Flexible Heaters (30)](https://blog.epectec.com/topic/flexible-heaters) - [Events, Training, and Support (9)](https://blog.epectec.com/topic/events-training-and-support) - [RF Products (7)](https://blog.epectec.com/topic/rf-products) - [CNC Machining (3)](https://blog.epectec.com/topic/cnc-machining) - [Fans & Motors (1)](https://blog.epectec.com/topic/fans-motors) See All --- --- ### Need Help with A Project? 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Please contact us with any questions or requests. - [176 Samuel Barnet Blvd, New Bedford, MA](https://maps.app.goo.gl/Q6JVMv3eQgw29fNY8) - [sales@epectec.com](mailto:sales@epectec.com?subject=Website%20Information%20Request) - [(888) 995-5171](tel:888-995-5171) --- ###### Certifications [![UL Certified Manufacturer](https://www.epectec.com/images/certified-ul.png "UL Certified Manufacturer")](http://www.ul.com/) [![ITAR Registered Manufacturer](https://www.epectec.com/images/certified-itar.png "ITAR Registered Manufacturer")](https://www.epectec.com/operations/itar-registered.html) [![RoHS Compliant Manufacturer](https://www.epectec.com/images/certified-rohs-compliant.png "RoHS Compliant Manufacturer")](https://www.epectec.com/pcb/rohs-compliant.html) [![ISO9001 Certified Manufacturer](https://www.epectec.com/images/certified-iso9001.png "ISO9001 Certified Manufacturer")](https://www.epectec.com/operations/approvals.html) [![ISO27001 Certified Manufacturer](https://www.epectec.com/images/certified-iso27001.png "ISO27001 Certified Manufacturer")](https://www.epectec.com/operations/approvals.html) --- - ##### About - [Company Overview](https://www.epectec.com/about/overview/) - [Our History](https://www.epectec.com/about/our-history/) - [Culture](https://www.epectec.com/about/culture/) - [Industries Served](https://www.epectec.com/about/industry/) - [Acquisitions](https://www.epectec.com/about/acquisitions.html) - ##### Operations - [Operational Excellence](https://www.epectec.com/operations/) - [Quality Philosophy](https://www.epectec.com/operations/quality-philosophy.html) - [Quality Assurance Process](https://www.epectec.com/operations/quality-assurance-process.html) - [Global Operations](https://www.epectec.com/operations/global-operations.html) - [Logistics & Supply Chain](https://www.epectec.com/operations/logistics-and-supply-chain.html) - [Inventory Stocking](https://www.epectec.com/operations/inventory-stocking.html) - [Approvals](https://www.epectec.com/operations/approvals.html) - [ITAR Registered](https://www.epectec.com/operations/itar-registered.html) - ##### Engineering - [Engineering Overview](https://www.epectec.com/engineering/overview/) - [Engineering Support](https://www.epectec.com/engineering/support/) - [Design Services](https://www.epectec.com/engineering/design-services/) - [EpecDFx™](https://www.epectec.com/engineering/epecdfx/) - [Free DFM File Check](https://www.epectec.com/engineering/free-dfm.html) - [PCB Impedance Calculator](https://www.epectec.com/engineering/impedance-calculator.html) - ##### Products - [Overview](https://www.epectec.com/products/) - [Battery Packs](https://www.epectec.com/batteries/) - [Flex & Rigid-Flex PCBS](https://www.epectec.com/flex/) - [Cable Assemblies](https://www.epectec.com/cable-assemblies/) - [Printed Circuit Boards](https://www.epectec.com/pcb/) - [CNC Machining](https://www.epectec.com/cnc-machining/) - [User Interfaces](https://www.epectec.com/user-interfaces/) - [Flexible Heaters](https://www.epectec.com/flexible-heaters/) - [EC Fans & Motors](https://www.epectec.com/fans-motors/) ##### Social Community Join our Social Community and keep in touch with all our latest technology investments, current news, upcoming events, and promotions. --- © 2026 Copyright Epec, LLC. 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