Defining and Managing Design Rules via the PCB Rules and Constraints Editor Dialog. From here Select the rules one by one or Ctrl+A OK.Altium Designer Notes and PCB Design Guidelines Table of Contents Shortcut Keys Schematic Designer PCB Designer Schematics Setup Before Layout Rules Stackup Set Net Colors Placement Useful Links README.mdTop 5 PCB Design Guidelines for EngineersDesign rules in Altium Designer are defined and managed from within the PCB Rules and Constraints Editor dialog or the Constraints Editor (Constraints document tab). This should open the Choose Design Rule Type panel. From here, Right click on Design Rules folder (top left side) Import Rules or Export Rules. While on the PCBDoc, go to Design Rules to open the PCB Rules and Constraints Editor Panel.
Altium Pcb Design Rules How To Define Design#1 - Fine-Tuning Your Component PlacementThe component placement stage of your PCB layout design process is both an art and a science, requiring a strategic consideration about the prime real estate available on your board. So what’s the key for designing a board that’s realistic on paper and in physical form? Let’s explore the top 5 PCB design guidelines that you need to know to design your next manufacturable, functional, and reliable PCB. But at the end of the day, not providing ample time and focused effort on the PCB layout basics can lead to a design that translates poorly from the digital domain to physical reality, and could ultimately become troublesome for your manufacturer to fabricate. Knowing how to define design guidelines.When starting a new printed circuit board design, it’s easy to leave the PCB design guidelines as an afterthought as you spend most of your time focusing on your circuit design and component selection.Altium Pcb Design Rules Free Path OfIt’s recommended to place all your surface mount devices (SMD) components on the same side of your board according to SMD PCB design rules. All through-hole (TH) components should be placed on the top side of your board to minimize the number of assembly steps.One final PCB layout design guideline to keep in mind - when using mixed-technology components (through-hole and surface mount components), manufacturers might require an extra process to assemble your board, which will add to your overall printed circuit board costs.Good Chip Components Orientation (left) and Poor Chip Components Orientation (right)Good Components Placement (left) and Poor Components Placement (right) #2 - Placing Your Power, Ground & Signal TracesWith your components placed, it’s now time to route your power, ground, and signal traces to ensure your signals have a clean and trouble-free path of travel. Avoid placing components on the solder side of a board that would rest behind plated through-hole components.Organization. It also helps ensure an efficient and error-free soldering process during assembly.Placement. Be sure to orient similar components in the same direction as this will help with effective routing in PCB design. ![]() ![]() This can be accomplished by first finding the “Thermal Resistance” ratings in your component’s datasheet, and then following the recommended guidelines to divert the heat being produced. Here are some guidelines to keep in mind to help combat heating issues:The first step is to start considering which components will dissipate the most heat on your board. To reduce capacitive coupling due to the placement of a large ground plane and the lines routed above and under it, try to have your analog ground crossed only by analog lines.Example of digital & analog sections in a PCB #4 - Combating Heating IssuesEver have your circuit performance degraded or even your board damaged because of heat issues? This problem afflicts many designers when heat dissipation isn’t taken into consideration. The same guideline can be followed to keep your digital and analog ground separate.Coupling. If you have placed your ground plane in the middle layer be sure to place a small impedance path to reduce the risk of any power circuit interference and to help protect your control signals. If you do have to tie them together in your PCBs, make sure it’s toward the end of your supply path.Placement. This is not always the best advice. Note that a power/ground via can appear near an IC with a fast switching speed, which generates a lot of heat. Because it can be difficult to maintain process temperatures, it’s always recommended to utilize thermal reliefs on through-hole components to make the soldering process as easy as possible by slowing the rate of heat sinking through the component plates.Some designers will tell you to use a thermal relief pattern for any via or hole that is connected to a ground or power plane. You may have to carefully balance the placement of these components against keeping trace lengths short as you devise a routing strategy, which can be challenging.Adding thermal reliefs can be incredibly useful to produce a manufacturable board and they are critical for wave soldering application on assemblies and multilayer boards with high copper content. This prevents hot spots from forming in the board. Huawei mobile partner 31110This will help to reduce mechanical stress and thermal stress.Typical thermal relief pattern #5 - Checking Your Layout Against Your PCB Design RulesIt’s easy to get overwhelmed toward the end of your design project as you scramble to fit your remaining pieces together for manufacturing. However, this can create a problem if your board is assembled using wave soldering, as you need to keep heat trapped near the surface.In addition to thermal reliefs, you can also add teardrops where traces join pads to provide additional copper foil /metal support. This is preferable to keeping heat trapped near the surface. Therefore, if a particular via is connected to a ground plane, omitting the thermal relief pads on that via will allow heat to conduct to the ground plane. If you use the right design software, you can run checks throughout the design process, which allows you to identify design potential problems early and correct them quickly. This automates PCB layout review guidelines for validating your layout.Note that many design processes state that you should run design rule checks at the end of the design phase while preparing for manufacturing. With these two systems, you can easily define gap widths, trace widths, common manufacturing requirements, high-speed electrical requirements, and other physical requirements for your particular application.
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