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UPCOMING EVENTS

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Topic list, column headers with buttons are sortable. Topic Posters Replies
Views Activity

Welcome to SierraConnect!
General
We are so glad you joined us. SierraConnect Review the terms of service for the
SierraConnect PCB forum. Learn about user responsibilities, privacy policies,
and the legal guidelines for using our platform. Here are … read more 61 700 Jan
2 Ask Me Anything with Ignacio de Mendizábal 6 days ago
Ask Me Anything
emc
Join our Ask Me Anything with Ignacio de Mendizábal where you can ask us
questions on: • Effective EMC design strategies • Troubleshooting and debugging
techniques • Overcoming challenges in high-speed and RF designs … read more 12
59 9h Top 5 DFA Rules for an Efficient Aerospace PCB
Design for Assembly
dfaaerospace
Designing an aerospace PCB demands precision and adherence to specific DFA
rules. This guide outlines 5 important design for assembly practices, focusing
on component placement, clearance requirements, and thermal con… read more 2 58
1d Plated vs. Unplated Mounting Holes
Assembly challenges and solutions
When designing PCBs with mounting holes for screws, there’s often debate about
whether the holes should be plated or unplated. Plated holes are generally
believed to offer better mechanical support for screws, reducing t… read more 6
63 1d Managing Ground Planes in Compact 4-Layer PCB Designs
Design and Layout
I’m looking for advice on handling ground planes. Is it better to designate both
internal ground planes with the same net (a unified GND), or should I separate
them into DGND (Digital Ground) and AGND (Analog Ground) and… read more 4 44 13h
Microwave PCB Design Challenges and How to Overcome Them   protoexpress.com
High Speed and Frequency
microwave-pcb-design
Originally published at:
https://www.protoexpress.com/blog/microwave-pcb-design-challenges-and-how-to-overcome-them/
Microwave PCB design presents unique challenges that differ from lower frequency
boards. At microwa… read more 4 21 7d Ask Me Anything about Controlled Impedance
a month ago
Ask Me Anything
controlled-impedanceimpedance
Join our Ask Me Anything about controlled impedance where you can ask us
questions on: • Dielectric materials • Trace width and spacing • Stack-up
configuration • And much more! Question submission … read more 30 100 22d
Microwave PCB Material Selection and CPW for Signal Integrity   protoexpress.com
Choosing materials
cpw-in-microwave-pcbmicrowave-pcb-materi
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… read more 5 26 6d Potential cost savings from eliminating
vias
Design and Layout
I’m designing a simple two-layer PCB (35mm x 25mm) and can potentially complete
the layout without any vias. I’m curious to know if eliminating vias from my PCB
design can potentially provide some cost savings. Is it wor… read more 6 228 16d
Thick copper layers
Schematic and layout
I am wondering what are the advantages and disadvantages of using thick copper
in the PCB stackups. One advantages is obvious that thick copper layers can
carry and is rated for higher current for the same trace width. … read more 12
127 Oct 5 Ask Me Anything about PCB Design for Assembly a month ago
Ask Me Anything
dfapcb-assemblyassembly
Join our Ask Me Anything about controlled impedance where you can ask us
questions on: • Component placement • Through-hole vs SMT assembly • Assembly
cost • And much more! Question submission windo… read more 10 58 22d Board edge
clearence
Design for Manufacturing
What clearance should I use on the board edge to Couper fill ? 3 36 21d Ask Me
Anything about High-Current PCBs 2 months ago
Ask Me Anything
current-capacitycurrent
Join our next Ask Me Anything about high-current PCBs where you can ask us
questions on: • Trace design • Thermal management • Copper weight • And much
more! Post your questions below before September 25th! 11 94 Sep 26 Ask Me
Anything about KiCad 8 3 months ago
Ask Me Anything
kicad
Join our next Ask Me Anything about KiCad 8 where you can ask us questions on:
Diff pair routing Custom footprints Via placement And much more! Question
submission window: Through September 11th 13 56 Sep 13 Ask Me Anything about PCB
Via Design 3 months ago
Ask Me Anything
viadrilling
Join our Ask Me Anything about via design where you can ask us questions on: •
Blind, buried and microvias • Stitching vias • Via stub length and backdrilling
• And much more! Question submission wi… read more 28 114 Sep 26 Live Q&A: HDI
PCB Design and Fabrication a month ago
Events
hdihigh-density
Mark your calendars to join our LIVE Q&A on HDI PCB design and fabrication! Post
your questions in this thread and our experts will reply during this live Q&A
which will be hosted on Zoom. Save to your Outlook calendar… read more 8 156 Oct
23 Ask Me Anything with Mark Hughes 8 months ago
Ask Me Anything
HOW TO MINIMIZE YOUR PCB PROJECT COSTS? Ask your questions in this thread and
expert @mjhughes will reply on March 27th! 43 660 Apr 11 Length Matching in
High-Speed PCB Design
Design and Layout
signal-integrityimpedance
I’m looking for clarification on the importance of length matching in high-speed
PCB design, specifically regarding its relationship with parallel data lines and
the clock signal. High-speed PCB design guidelines often r… read more 3 145 Oct
25 Power Supply Board PCB Stackup
Schematic and layout
I am working on a Power Supply Board. I am wondering what consideration do I
need to consider when it comes to power and ground planes and what trace width
do I need to use for power signals. I am thinking of 4 layer Sta… read more 17
105 Sep 11 What size tooling holes do you use?
Design for Assembly
pcb-assembly
I’m curious to know what size tooling holes you typically use, especially when
the application is on breakaway assembly rails. 4 42 16d Impedance requirement
of 100 ohms for the HDMI differential pair
Design and Layout
controlled-impedance
I’m working on a 6-layer FR4 PCB and need to achieve 100-ohm impedance for HDMI
differential pairs. I’m using only the top and bottom layers for these
differential pairs, and here are the parameters I have so far: Dielec… read more
4 74 Oct 29 Adding copper pours on top/bottom signal layers
Design and Layout
I have a 4-layer PCB with layer stack-up as follows Signal-GND-Power-Signal. The
board operates at either 8 MHz (3.3V) or 16 MHz (5V) with no active RF
components—just SPI-based surface-mounted devices. The total size of… read more
4 54 Oct 14 Calculating Trace Length Tolerances in High-Speed PCB Design
Design and Layout
signal-integrityhigh-speed
I’m working on a design where I need to interface a video format converter with
an ADC that converts analog RGB data to digital. The data connection between
them involves a 20-bit bus running at approximately 170MHz. Due… read more 3 93
Oct 18 10 Best Layout Tips for High-Speed and High-Current PCB Traces  
protoexpress.com
High Speed and Frequency
trace-designhigh-current
Originally published at:
https://www.protoexpress.com/blog/best-layout-tips-for-high-speed-and-high-current-pcb-traces/
When designing PCBs for frequencies over 5 GHz and current above 2A, trace
design becomes paramo… read more 4 33 14d Win a FREE seat for Susy Webb’s
routing and signal return path seminar!
Giveaway Zone
routingpcb-routingsignal-return-path
We are offering our valued SierraConnect members a chance to win a seat (worth
$245) for @susy.webb’s seminar on designing the routing and signal return path
of digital PCBs. Here’s how you can enter: Follow SierraConn… read more 7 56 Sep
18 Ask Me Anything with Mike Jouppi 8 months ago
Ask Me Anything
heat-managementthermal-management
Have a question on thermal management? Post in this thread before April 10th and
Mike Jouppi will answer! 28 551 Apr 13 No clean flux vs washing
Manufacturing process
flux
I have a PCB with barbed port pressure sensors. In the past I’ve used these and
don’t believe no clean flux was used. Now I am told these parts can’t be washed.
Seems there are three options: Hand solder the pressure s… read more 10 217 Sep
27 Effective 4-Layer PCB Stack-Up Strategies for high density boards
Design and Layout
stack-up
I need advice on designing a stack-up for a 4-layer PCB with a high-density top
layer. I understand that the optimal stack-up configurations are usually either
Option 1 or Option 2 because they provide a good return path… read more 9 193
Aug 9 Ask Me Anything about Blind and Buried Vias 3 months ago
Ask Me Anything
viahdiburied-viablind-via
Join our next Ask Me Anything about blind and buried vias where you can ask us
questions on: • Design rules and constraints • Benefits of HDI • Cost
implications • And much more! Question submission… read more 10 47 Sep 5 Live
Q&A: Material Selection 4 months ago
Events
pcb-materialsmaterials
Mark your calendars to join our LIVE Q&A on material selection! Post your
questions in this thread and our experts will reply during this live Q&A which
will be hosted on Zoom. Notes: This is not a webinar. There will… read more 10
205 Aug 20










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