News & Updates
Blog
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Getting Through a PCB DFM Check
In this article, we’ll discuss the key design features to implement, and steps to take prior to fabrication that will help prevent some common DFM problems. I’ll also provide examples of where I commonly see these PCB DFM problems in signal integrity circuits.
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What is Spreading Inductance?
If you’re working with a high-speed digital component, there are some simple power integrity rules that should be followed. However, there is one quantity that is sometimes ignored when building a PDN impedance simulation: the spreading inductance of your plane pair. Here are some points designers should know about the spreading inductance of a plane pair.
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PCB Design Basics for New Designers
In this article, I’ll present some design basics that every new designer should follow to help ensure their design process is successful. Some of these points may challenge the conventional view of how circuit boards are constructed, but they are intended to help balance low noise signaling, manufacturability, and ease of solving a layout.
On-Demand Webinar
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Efficient PCB Routing Using Gloss and Retrace Tools
The primary goal of your traces is to carry signals throughout your board without losses. To do this properly, you must familiarize yourself with the requirements for signals on the printed circuit board and how to optimize the topology of the board in terms of signal integrity. We will analyze the most popular routing cases applicable for using the Gloss and Retrace tools in Altium Designer to optimize your signal integrity.
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Selecting Materials for High Voltage PCB Design and Layout
High voltage PCBs are subject to certain safety and reliability concerns that you won’t find in most other boards. If your fabrication house specializes in high voltage PCBs and keeps materials in stock, they can likely recommend a material set, as well as a standard stackup you might use for certain voltage ranges and frequencies. If you need to choose your own materials, follow the tips below to help you narrow down to the right material set.
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When to Use Tented Vias in Your PCB Layout
There are some guidelines I see many designers implement as a standard practice, often without thinking about it. Some of these practices are misunderstood or implemented without best practices. Others are implemented without thinking about the potential problems. One of these is the use of tented vias, which is sometimes implemented in a PCB layout by default. Is this always the right practice?
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How to Impedance Match and Terminate Capacitive Loads
The idea of a purely capacitive load is something of a fallacy. Yes, capacitors exist, but all capacitors are non-ideal, and it is this deviation from a theoretical capacitance that determines how to impedance match a load that exhibits capacitive behavior. Let’s take a look at this important aspect of interconnect design and see what it really means to terminate a capacitive load.
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Using Altium 365 Over Your Vanilla Version Control System
There are all sorts of version control systems out there that people have been using with their PCB design software. As discussed in Why Use a Version Control System, we looked at different options ranging for local hard drive storage to sophisticated online revisioning systems. In this article we will be reviewing the differences between a standard VCS and Altium 365.
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Why Use a Version Control System in PCB Design
Version Control Systems (VCS) have been around for many decades within the software world but can be surprisingly new to some folks in the electronics design industry. This article will cover what a VCS is, what it does, and why you should be using one for your PCB design projects.
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Meeting Standards: IPC 6012 Class 3 Annular Ring
Designers often conflate leftover annular ring and pad sizes - they need to place a sufficiently large pad size on the surface layer to ensure that the annular ring that is leftover during fabrication will be large enough. As long as the annular ring is sufficiently large, the drill hit will not be considered defective and the board will have passed inspection. In this article, I'll discuss the limits on IPC-6012 Class 3 annular rings as these are a standard fabrication requirement for high-reliability rigid PCBs.
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Decoding PCB Fabrication Notes
Sending a board out for fabrication is an exciting and nerve-wracking moment. Why not just give your fabricator your design files and let them figure it out? There are a few reasons for this, but it means the responsibility comes back to you as the designer to produce manufacturing files and documentation for your PCB. It’s actually quite simple if you have the right design tools. We’ll look at how you can do this inside your PCB layout and how this will help you quickly generate data for your manufacturer.
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Everything You Need to Know about Conformal Coating
Explore the basics of conformal coating with us. Conformal coating is a protective layer applied to electronic circuits to guard against environmental factors such as moisture and dust.
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Introduction to Open Source Laptop Project
We have started a very exciting journey into the creation of an open source laptop project. This project will be an ongoing one, with our community able interactively participate. By utilizing Altium 365 users will be able to view, comment on, and download design files. This will be a great learning experience for new and experienced PCB designers.
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Mechanical and Electrical Design Come Together With Altium’s MCAD CoDesigner
Electronics designers working in small design houses or in large enterprises often encounter a common set of challenges when interfacing with mechanical designers. Continue reading to learn how you can best interface with your mechanical designer to get your projects out the door fast!
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Ebook: Routing High-Density Interconnects with Reliable Microvias
HDI PCBs take a particular approach to routing interconnects through multiple layers to ensure reliability during fabrication, assembly, and operation. The critical structure that enables this is microvias, which are prone to failure if not designed properly. In this e-book, readers will receive an initial look at the reasons microvia reliability has come into the spotlight and why HDI PCB designers put reliability first when routing through microvias.
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IPC-2221 Calculator for PCB Trace Current and Heating
Aside from impedance and annular ring calculations, one of the other major formulas specified in the IPC 2221 standard relates temperature rise, trace width, and trace current. THere is also the IPC-2152 standard, both include this guidance on designing for thermal reliability, but which standard should we use?
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Stripline Impedance Calculator
Striplines provide some advantages over microstrips as they take advantage of natural shielding and coupling from nearby ground plane layers. Although they tend to experience higher losses due to total confinement in the dielectric, they can be thinner due to the high dielectric constant used in internal layers of a PCB. Use our free impedence calculator to help you determine the correct width needed to hit a target impedance.
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Which Types of Opto-Isolators Are Right For Your Signal?
An optoisolator is a cool electronic device that can be used to pass information between a diode without passing an electrical current. There are many great applications for these, but do you know which one is right for you?
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Properties panel document options in SCH editors
The Properties panel provides access to the properties of documents and objects. The contents of the panel change depending on the active document or the selected object. This blog will quickly go over some of need to know options around the properties panel in the schematic document.
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The High-Speed PCB Stackup Design Challenge
Even with all the good guidelines out there for high speed design, there are particular aspects of stackup construction and their relation to building boards that get overlooked. This blog is goes beyond just the typical SI/PI guidelines and looks at these problems from more of an engineering perspective.
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Everything You Need to Know About Stitching Vias
Stitching vias are something you often see spread around the surface layer of a PCB, but what are they? and should you be using them? In this guide, we'll go over some of the standard uses of stitching vias and when they should be used in a PCB.
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PCB Stackup Basics
In comparison to the build-up of a PCB, the stackup is more concerned with the electrical type of each layer, that is are we working with signals, power, or ground. Continue reading to learn how you can optimize your layer stack.
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Multi-board and Harness Design Capability in Altium Designer 23
Altium’s VP of marketing Lawrence Romine discusses the multi-board and harness design capabilities coming in Altium Designer 23.
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Controlled ESR Capacitors: Should You Use Them for Power Integrity?
Controlled ESR capacitors are important for power integrity in your design as they can help smooth out the PDN impedance spectrum in your high speed PCB.
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How Does the Package PDN Impact Power Integrity?
Whenever we say something to the effect of “components can’t work without a correctly designed PCB,” we only have to look at component packaging for evidence. It is true that component packages come with parasitics that affect signal integrity, but there is one area that we don’t often look at in terms of component packaging: power integrity.
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Designing Custom Hardware with Microcontrollers
In this article, we’ll look at all that is required to start creating your own custom microcontroller-based hardware designs. You’ll see that there actually isn’t too much to this, as microcontroller manufacturers over the years have tried to make the learning curve less steep and their devices more, and more accessible. This is both from an electrical point of view but also – equally importantly – from a programming point of view.
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Guide to Low-Dk PCB Materials
If you’ve taken time to learn about PCB material options and layer constructions, you have probably seen the wide range of materials that are available on the market. Materials companies produce laminates with varying Dk values, Tg values, weave styles, CTI values, and mechanical properties to target various applications in the electronics industry.
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