52 results found

There are several types of HDI board constructions that offer different advantages: 1. Build-Up HDI This uses a conventional PCB core (typically FR-4) with additional build-up dielectric and copper layers laminated on top to form the HDI structure. The I/O pads connect through the core layers to the build-up layers. 2. Coreless HDI As the name implies, corel...

The dielectric materials used in HDI fabrication are specialized laminates engineered to enable the fine features, withstand the demanding processing conditions required, and deliver stable electrical performance. Typical materials for HDI include: Polyimides Polyimides like HD-4000 from Hitachi or Durimide from Rogers offer thermoset polymers with excellent...

A microvia is a small plated through hole that electrically connects HDI conductive layers in a PCB. The most distinguishing feature of HDI circuit boards is the extensive use of microvias in the design. Standard PCB vias range from 8 to 12 mils in diameter. In contrast, microvia diameters typically fall between 3 to 8 mils. The reduced size of microvias is ...

HDI PCB manufacturing methods vary depending on the HDI builds, and the common manufacturing is sequential laminating. The simplest 1+N+1 HDI PCB manufacturing is similar to multilayer PCB manufacturing. For example, a four-layer HDI PCB with a 1+2+1 structure is manufactured in this way: 1. The two inner PCB layers are manufactured and laminated, and the tw...

Below are some key design considerations for heavy copper PCBs: Layer Stacking Position thick copper layers close to the board center to minimize warpage. Do not place outer layers next to each other as it exacerbates registration issues. Rotate fiber weave direction 90° between adjacent dielectric layers for stability. Component Placement Ensure sufficient ...

Heavy copper PCBs offer distinct advantages in electronics, such as handling higher currents, enhancing thermal management, and providing exceptional mechanical strength. Additional characteristics include: High Mechanical Strength: Superior resistance to bending, warping, and stress, ensuring durability and reliability. Excellent Weather Resistance: Suitabl...

No matter what manufacturing process a PCB manufacturer adopts, there is one technical difficulty that needs to be faced: solving the problem of uneven thickness of heavy copper PCBs. The manufacturing steps and precautions are as follows: Use etching to make inner layer traces on each layer of inner core material of the thick copper PCB (note: open a copper...

Heavy Copper PCBs are used in high-current and high-power applications, requiring materials with excellent conductivity, heat dissipation, and mechanical strength. The main materials include: 1. Substrate Material (Dielectric Material) FR-4 (Glass Fiber Reinforced Epoxy Resin) Features: Commonly used for standard and medium-thickness copper layers (up to 5oz...

If you’re looking for a fast route to market, a PCB prototype can help you get there. These high-quality prototypes can be made in as little as two days! You can even have them validated at every stage. Here are the steps to a fast PCB prototype. Getting to market with a PCB prototype PCB prototyping is a good way to test the viability of your design before ...

Designing high-frequency PCBs presents several unique challenges compared to traditional PCB design, primarily due to the way high-frequency signals behave. The primary challenges stem from signal integrity, impedance control, electromagnetic interference (EMI), and the need for precise materials and manufacturing processes. Below, I’ve outlined some common ...

High-frequency PCB design is a specialized field that requires careful attention to signal integrity, impedance control, and electromagnetic interference (EMI) mitigation. Designing a PCB for high-frequency signals (typically above 100 MHz) or microwave frequencies (GHz range) demands a solid understanding of electrical engineering principles and the unique ...

High-frequency PCBs require specific materials to ensure reliable performance in signal transmission at elevated frequencies. These materials must have stable electrical properties, low loss, and good signal integrity. Here’s an overview of the most commonly used materials for high-frequency PCBs: 1. PTFE (Polytetrafluoroethylene) Common Brand Names: Teflon,...