# Choosing materials **URL:** https://sierraconnect.protoexpress.com/c/manufacturing/choosing-materials/25.md [Latest](https://sierraconnect.protoexpress.com/latest.md) · [Categories](https://sierraconnect.protoexpress.com/categories.md) · [Tags](https://sierraconnect.protoexpress.com/tags.md) --- ## [About the Choosing materials category](https://sierraconnect.protoexpress.com/t/about-the-choosing-materials-category/33)
**Author:** [@lucy.sierracircuits](https://sierraconnect.protoexpress.com/u/lucy.sierracircuits)\ **Replies:** 0\ **Last updated:** [September 5, 2023, 10:25pm UTC](https://sierraconnect.protoexpress.com/t/about-the-choosing-materials-category/33 "2023-09-05T22:25:46Z")
The Choosing Materials category on SierraConnect is dedicated to discussions and insights on selecting the right materials for your PCB projects. Here, you’ll find guidance on factors like thermal performance, signal int… --- ## [How do you choose the right material for an HDI PCB?](https://sierraconnect.protoexpress.com/t/how-do-you-choose-the-right-material-for-an-hdi-pcb/4252)
**Author:** [@Sushmitha](https://sierraconnect.protoexpress.com/u/Sushmitha)\ **Replies:** 2\ **Last updated:** [July 15, 2026, 2:03pm UTC](https://sierraconnect.protoexpress.com/t/how-do-you-choose-the-right-material-for-an-hdi-pcb/4252 "2026-07-15T14:03:55Z")
Selecting the right material is one of the earliest decisions in an HDI design. It affects signal integrity, thermal reliability, laser drilling performance, manufacturability, and overall cost I wanted to start a discu… --- ## [How do you choose the right material for an RF PCB design?](https://sierraconnect.protoexpress.com/t/how-do-you-choose-the-right-material-for-an-rf-pcb-design/4178)
**Author:** [@Pooja\_Mitra](https://sierraconnect.protoexpress.com/u/Pooja_Mitra)\ **Replies:** 2\ **Last updated:** [June 24, 2026, 2:33pm UTC](https://sierraconnect.protoexpress.com/t/how-do-you-choose-the-right-material-for-an-rf-pcb-design/4178 "2026-06-24T14:33:13Z")
One of the earliest decisions in an RF design is material selection. Many RF designs begin on standard FR-4 because of its availability and cost advantages, but as operating frequency increases, material properties start… --- ## [Top 10 PCB Material OEMs and Popular Laminate Families](https://sierraconnect.protoexpress.com/t/top-10-pcb-material-oems-and-popular-laminate-families/4067)
**Author:** [@Pooja\_Mitra](https://sierraconnect.protoexpress.com/u/Pooja_Mitra)\ **Replies:** 0\ **Last updated:** [May 14, 2026, 4:06pm UTC](https://sierraconnect.protoexpress.com/t/top-10-pcb-material-oems-and-popular-laminate-families/4067 "2026-05-14T16:06:01Z")
Originally published at: Top PCB Material OEMs and Laminate Families | Sierra Circuits PCB material OEMs such as Isola, Rogers, and DuPont develop laminates optimized for specific electrical and mechanical requiremen… --- ## [How do you decide between PTFE and non-PTFE laminates for RF designs?](https://sierraconnect.protoexpress.com/t/how-do-you-decide-between-ptfe-and-non-ptfe-laminates-for-rf-designs/3978)
**Author:** [@Zaibahmed\_Mannur](https://sierraconnect.protoexpress.com/u/Zaibahmed_Mannur)\ **Replies:** 5\ **Last updated:** [April 16, 2026, 5:05pm UTC](https://sierraconnect.protoexpress.com/t/how-do-you-decide-between-ptfe-and-non-ptfe-laminates-for-rf-designs/3978 "2026-04-16T17:05:54Z")
We often see designers struggle with material selection in RF and high-frequency PCB designs, especially when deciding between PTFE and non-PTFE laminates. I wanted to start a discussion on how engineers balance these co… --- ## [Why consumer power adapters & small appliances often use single-sided PCBs](https://sierraconnect.protoexpress.com/t/why-consumer-power-adapters-small-appliances-often-use-single-sided-pcbs/3906)
**Author:** [@Rilley](https://sierraconnect.protoexpress.com/u/Rilley)\ **Replies:** 6\ **Last updated:** [March 26, 2026, 3:38pm UTC](https://sierraconnect.protoexpress.com/t/why-consumer-power-adapters-small-appliances-often-use-single-sided-pcbs/3906 "2026-03-26T15:38:09Z")
I’ve noticed that many consumer power adapters and small appliances use single-sided FR-2 boards with through-hole components. Is it just about cost and wave soldering, or are there other manufacturing advantages to usin… --- ## [RF Vs. Microwave PCB Materials](https://sierraconnect.protoexpress.com/t/rf-vs-microwave-pcb-materials/3794)
**Author:** [@Mohamed\_Faheemuddin](https://sierraconnect.protoexpress.com/u/Mohamed_Faheemuddin)\ **Replies:** 0\ **Last updated:** [January 13, 2026, 9:43am UTC](https://sierraconnect.protoexpress.com/t/rf-vs-microwave-pcb-materials/3794 "2026-01-13T09:43:59Z")
Choosing the right PCB material is one of the most critical decisions in RF and microwave designs. These circuits have differences in operating frequency, electrical behavior, and loss mechanisms. The infographic abo… --- ## [How to Choose PCB Laminates Based on IPC Standards](https://sierraconnect.protoexpress.com/t/how-to-choose-pcb-laminates-based-on-ipc-standards/3571)
**Author:** [@lucy.sierracircuits](https://sierraconnect.protoexpress.com/u/lucy.sierracircuits)\ **Replies:** 0\ **Last updated:** [September 18, 2025, 3:09pm UTC](https://sierraconnect.protoexpress.com/t/how-to-choose-pcb-laminates-based-on-ipc-standards/3571 "2025-09-18T15:09:10Z")
Originally published at: https://www.protoexpress.com/blog/how-to-choose-pcb-laminates-based-on-ipc-standards/ Following IPC standards for PCB laminates makes it easier to choose dielectric materials that fit the spe… --- ## [Seeking cost-effective alternatives to LF-HASL and ENIG](https://sierraconnect.protoexpress.com/t/seeking-cost-effective-alternatives-to-lf-hasl-and-enig/3326)
**Author:** [@mark](https://sierraconnect.protoexpress.com/u/mark)\ **Replies:** 5\ **Last updated:** [July 21, 2025, 3:09pm UTC](https://sierraconnect.protoexpress.com/t/seeking-cost-effective-alternatives-to-lf-hasl-and-enig/3326 "2025-07-21T15:09:50Z")
My designs are mostly small, low-voltage, sub-GHz embedded systems, with some non-safety-critical automotive products. Operating temperatures range from -40°C to 85°C. Most components are 0.5 mm pitch or smaller. Occasio… --- ## [Why PCB Material Selection Matters in RF Designs](https://sierraconnect.protoexpress.com/t/why-pcb-material-selection-matters-in-rf-designs/3055)
**Author:** [@lucy.sierracircuits](https://sierraconnect.protoexpress.com/u/lucy.sierracircuits)\ **Replies:** 0\ **Last updated:** [April 4, 2025, 5:17pm UTC](https://sierraconnect.protoexpress.com/t/why-pcb-material-selection-matters-in-rf-designs/3055 "2025-04-04T17:17:46Z")
Why is material selection critical in RF designs? Because the base material isn’t just a carrier—it directly influences signal behavior. It affects parameters like propagation speed, phase shift, and signal loss (att… --- ## [OPEN DISCUSSION: How do you balance cost vs. performance when choosing PCB materials?](https://sierraconnect.protoexpress.com/t/open-discussion-how-do-you-balance-cost-vs-performance-when-choosing-pcb-materials/2763)
**Author:** [@lucy.sierracircuits](https://sierraconnect.protoexpress.com/u/lucy.sierracircuits)\ **Replies:** 5\ **Last updated:** [January 6, 2025, 7:08pm UTC](https://sierraconnect.protoexpress.com/t/open-discussion-how-do-you-balance-cost-vs-performance-when-choosing-pcb-materials/2763 "2025-01-06T19:08:34Z")
Choosing the right PCB materials is often a trade-off between cost and performance. Factors like signal integrity, thermal management, and manufacturability all come into play. We’d love to hear your thoughts on this! ►… --- ## [Microwave PCB Material Selection and CPW for Signal Integrity](https://sierraconnect.protoexpress.com/t/microwave-pcb-material-selection-and-cpw-for-signal-integrity/2592)
**Author:** [@Pooja\_Mitra](https://sierraconnect.protoexpress.com/u/Pooja_Mitra)\ **Replies:** 5\ **Last updated:** [November 28, 2024, 4:35am UTC](https://sierraconnect.protoexpress.com/t/microwave-pcb-material-selection-and-cpw-for-signal-integrity/2592 "2024-11-28T04:35:47Z")
Originally published at: https://www.protoexpress.com/blog/microwave-pcb-material-selection-and-cpw-for-signal-integrity/ Designing microwave boards involves meticulous selection of PCB materials, precise etching, an… --- ## [6 tips for selecting RF and microwave PCB materials](https://sierraconnect.protoexpress.com/t/6-tips-for-selecting-rf-and-microwave-pcb-materials/2621)
**Author:** [@lucy.sierracircuits](https://sierraconnect.protoexpress.com/u/lucy.sierracircuits)\ **Replies:** 0\ **Last updated:** [October 28, 2024, 10:02pm UTC](https://sierraconnect.protoexpress.com/t/6-tips-for-selecting-rf-and-microwave-pcb-materials/2621 "2024-10-28T22:02:51Z")
Selecting the right PCB materials for RF and microwave applications is crucial for achieving optimal performance. Given the unique demands of high-frequency circuits, such as minimal signal loss and stable electrical … --- ## [Closely spaced hi voltage traces and connector](https://sierraconnect.protoexpress.com/t/closely-spaced-hi-voltage-traces-and-connector/2576)
**Author:** [@greg](https://sierraconnect.protoexpress.com/u/greg)\ **Replies:** 1\ **Last updated:** [October 15, 2024, 7:46pm UTC](https://sierraconnect.protoexpress.com/t/closely-spaced-hi-voltage-traces-and-connector/2576 "2024-10-15T19:46:20Z")
We are designing a board to make a static electric field with constant voltages in the vertical direction, and exponentially varying voltages in the horizontal direction. Voltages vary from -5000V on the left side down t… --- ## [PCB Copper thickness Price chart](https://sierraconnect.protoexpress.com/t/pcb-copper-thickness-price-chart/1760)
**Author:** [@vigneshwaran.balu](https://sierraconnect.protoexpress.com/u/vigneshwaran.balu)\ **Replies:** 6\ **Last updated:** [September 2, 2024, 11:27am UTC](https://sierraconnect.protoexpress.com/t/pcb-copper-thickness-price-chart/1760 "2024-09-02T11:27:53Z")
For my design have Max current rating is 250A, so which is the best option by increasing copper thickness or increasing copper stack-up layer, is there any Price table available for copper thickness (no information in qu… --- ## [Choosing the right PCB Material](https://sierraconnect.protoexpress.com/t/choosing-the-right-pcb-material/1586)
**Author:** [@gigio](https://sierraconnect.protoexpress.com/u/gigio)\ **Replies:** 6\ **Last updated:** [August 19, 2024, 2:10pm UTC](https://sierraconnect.protoexpress.com/t/choosing-the-right-pcb-material/1586 "2024-08-19T14:10:38Z")
Designing a 4-layer PCB with impedance control (1 signal, 2 GND plane, 3 PWR plane, 4 signal) has raised some questions. While checking the layer stack-up in Altium, the thickness and dielectric constant (dk) appeared in… --- ## [Choosing the right finish](https://sierraconnect.protoexpress.com/t/choosing-the-right-finish/1303)
**Author:** [@Madison](https://sierraconnect.protoexpress.com/u/Madison)\ **Replies:** 2\ **Last updated:** [June 18, 2024, 1:03pm UTC](https://sierraconnect.protoexpress.com/t/choosing-the-right-finish/1303 "2024-06-18T13:03:01Z")
I’m currently working on a 4-layer PCB design with FR4 material and a thickness of 1.6mm. I have ICs with 0.5mm pitch pads and some very small LEDs with 0.4mm pitch pads. I’m debating between using ENIG (more expensive) … --- ## [Glass Cloth Types in FR4 Laminates](https://sierraconnect.protoexpress.com/t/glass-cloth-types-in-fr4-laminates/1320)
**Author:** [@Henry](https://sierraconnect.protoexpress.com/u/Henry)\ **Replies:** 1\ **Last updated:** [April 15, 2024, 9:50pm UTC](https://sierraconnect.protoexpress.com/t/glass-cloth-types-in-fr4-laminates/1320 "2024-04-15T21:50:50Z")
I was reviewing an FR4 laminate datasheet and noticed options for different glass cloth types, specifically 106 and 1067 glass. Could you explain the key differences between these two types of glass cloth used in FR4 lam… --- ## [PCB material for high-speed designs](https://sierraconnect.protoexpress.com/t/pcb-material-for-high-speed-designs/845)
**Author:** [@George](https://sierraconnect.protoexpress.com/u/George)\ **Replies:** 2\ **Last updated:** [March 11, 2024, 8:34pm UTC](https://sierraconnect.protoexpress.com/t/pcb-material-for-high-speed-designs/845 "2024-03-11T20:34:31Z")
Can you recommend a few materials that provide low leakage loss on boards operating above 20 GHz? --- ## [How to Choose PCB Laminates and Materials for Fabrication](https://sierraconnect.protoexpress.com/t/how-to-choose-pcb-laminates-and-materials-for-fabrication/883)
**Author:** [@lucy.sierracircuits](https://sierraconnect.protoexpress.com/u/lucy.sierracircuits)\ **Replies:** 0\ **Last updated:** [January 16, 2024, 10:13pm UTC](https://sierraconnect.protoexpress.com/t/how-to-choose-pcb-laminates-and-materials-for-fabrication/883 "2024-01-16T22:13:11Z")
Originally published at: https://www.protoexpress.com/blog/comparing-the-manufacturability-of-pcb-laminates/ PCB material selection is the first step in your PCB design process. Selecting the right materials for your… --- ## [PCB Substrates: Knowing Your Dielectric Material’s Properties](https://sierraconnect.protoexpress.com/t/pcb-substrates-knowing-your-dielectric-material-s-properties/882)
**Author:** [@lucy.sierracircuits](https://sierraconnect.protoexpress.com/u/lucy.sierracircuits)\ **Replies:** 0\ **Last updated:** [January 16, 2024, 10:09pm UTC](https://sierraconnect.protoexpress.com/t/pcb-substrates-knowing-your-dielectric-material-s-properties/882 "2024-01-16T22:09:34Z")
Originally published at: https://www.protoexpress.com/blog/pcb-substrates-knowing-dielectric-materials-properties/ A dielectric material conducts minimal electricity and provides an insulating layer between two condu… --- ## [Panasonic Megtron availability at Sierra](https://sierraconnect.protoexpress.com/t/panasonic-megtron-availability-at-sierra/631)
**Author:** [@Sajal\_ee](https://sierraconnect.protoexpress.com/u/Sajal_ee)\ **Replies:** 1\ **Last updated:** [November 30, 2023, 11:36pm UTC](https://sierraconnect.protoexpress.com/t/panasonic-megtron-availability-at-sierra/631 "2023-11-30T23:36:45Z")
I was reading an e-book in HDI design and found that Panasonic Megtron is not mentioned in the list. Please indicate which material in the list is representing Megtron 4 or Megtron 6. --- ## [High Speed PCB Materials: Rogers 4350B and Panasonic Megtron 6](https://sierraconnect.protoexpress.com/t/high-speed-pcb-materials-rogers-4350b-and-panasonic-megtron-6/245)
**Author:** [@lucy.sierracircuits](https://sierraconnect.protoexpress.com/u/lucy.sierracircuits)\ **Replies:** 0\ **Last updated:** [October 17, 2023, 7:04am UTC](https://sierraconnect.protoexpress.com/t/high-speed-pcb-materials-rogers-4350b-and-panasonic-megtron-6/245 "2023-10-17T07:04:55Z")
Originally published at: https://www.protoexpress.com/blog/tale-of-two-materials/ There has been extensive research on the development of low loss materials in the past few decades with embedded optical channels havi… --- ## [Why FR4 Material is Commonly used in PCB Fabrication?](https://sierraconnect.protoexpress.com/t/why-fr4-material-is-commonly-used-in-pcb-fabrication/164)
**Author:** [@lucy.sierracircuits](https://sierraconnect.protoexpress.com/u/lucy.sierracircuits)\ **Replies:** 0\ **Last updated:** [September 28, 2023, 6:39pm UTC](https://sierraconnect.protoexpress.com/t/why-fr4-material-is-commonly-used-in-pcb-fabrication/164 "2023-09-28T18:39:33Z")
Originally published at: https://www.protoexpress.com/blog/why-fr4-material-in-pcb-fabrication/ FR4 is the most common grade dielectric material that is used in the fabrication of circuit boards. This material is inc…