1 / 5

Blank Circuit Boards - Their Types, Materials, Applications, and Manufacturing Process

SQPCB offers premium blank circuit boards suitable for a wide range of electronic projects and custom PCB designs. Our blank PCBs provide a reliable foundation for prototyping and production, ensuring precise layer alignment, excellent conductivity, and durability. Whether for single-layer or multi-layer applications, SQPCB delivers high-quality blank circuit boards ready for your assembly needs. Learn more at sqpcb.com

AUGUST7
Télécharger la présentation

Blank Circuit Boards - Their Types, Materials, Applications, and Manufacturing Process

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. A blank circuit board (also called a bare PCB) is the base board before electronic components are mounted or soldered.It consists of conductive copper tracks and insulating substrate materials but no active parts (like chips, resistors, or capacitors). Blank PCBs form the foundation of every electronic device — they provide: • Electrical interconnections between components • Mechanical support for assembly • Heat dissipation paths • Signal integrity and grounding structure 2. Types of Blank Circuit Boards Blank PCBs are categorized mainly by layer count, flexibility, and functionality: a. Based on Layer Count 1.Single-Sided PCB oCopper layer on one side only. oSimple and cost-effective. oUsed in low-density, low-cost electronics (calculators, toys). 2.Double-Sided PCB oCopper layers on both sides, connected with plated-through holes (PTH). oCommon for consumer and industrial electronics. 3.Multilayer PCB oMultiple layers of copper separated by insulating materials. oUsed in complex, high-speed circuits like servers, smartphones, and aerospace electronics. b. Based on Flexibility 1.Rigid PCB oMade from solid substrate (like FR4 fiberglass). oMost common type in consumer electronics. 2.Flexible PCB (FPC) oUses bendable materials like polyimide (PI). oIdeal for compact or foldable devices (wearables, cameras, smartphones). 3.Rigid-Flex PCB

  2. oCombines rigid and flexible sections. oUsed in aerospace, military, and high-reliability applications. c. Based on Functionality 1.High-Frequency PCB oMade with PTFE (Teflon) or Rogers materials for RF/microwave circuits. oUsed in radar, 5G, and satellite communication. 2.Aluminum (Metal Core) PCB oUses aluminum base for heat dissipation. oCommon in LED lighting and power circuits. 3.HDI (High-Density Interconnect) PCB oUses microvias and fine traces for compact designs. oFound in smartphones, tablets, and IoT devices. 4.Ceramic PCB oMade from alumina or aluminum nitride. oExcellent for high-temperature and high-frequency applications. 3. Materials Used in Blank PCBs Component Common Materials Purpose Substrate (Base) FR4 (fiberglass epoxy), Polyimide (PI), Aluminum, Ceramic Provides structure and insulation Conductive Layer Copper (typically 1 oz or 35 µm thick) Forms electrical paths Epoxy resin or photoimageable polymer Solder Mask Insulates and protects copper Silkscreen Layer Labels and identifiers (component markings, logos) Epoxy ink

  3. Component Common Materials Purpose HASL, ENIG, OSP, Immersion Silver, Hard Gold Protects copper from oxidation and ensures solderability Surface Finish 4. Manufacturing Process of Blank Circuit Boards Step – Design and Layout • Engineers create the PCB design using CAD software (e.g., Altium, KiCad, Eagle). • Design files (Gerber files) define copper traces, holes, and layers. Step – Material Preparation • Start with a copper-clad laminate (FR4 board with copper on one or both sides). Step – Imaging / Patterning • Apply a photoresist layer. • Use UV exposure or Laser Direct Imaging (LDI) to transfer the circuit pattern onto the board. Step – Etching • Remove unwanted copper using chemical etching. • Leaves behind only the desired copper traces. Step – Drilling • Drill holes for through-hole components or vias (mechanical or laser drilling). Step – Plating & PTH • Plate copper inside drilled holes to form interlayer connections (for double/multilayer boards). Step – Lamination (for Multilayer Boards) • Press multiple copper and prepreg layers under heat and pressure. Step – Solder Mask Application • Apply and cure a protective solder mask layer, leaving component pads exposed. Step – Silkscreen Printing • Add legends (labels, polarity marks, part numbers). Step – Surface Finishing • Apply final surface finish (ENIG, HASL, etc.) to prevent oxidation and ensure solderability.

  4. Step 1 – Testing • Electrical testing (flying probe or bed-of-nails) ensures all traces and vias are correct. Step 1 – Cutting / Profiling • Cut boards to final shape using routing or V-scoring. 5. Applications of Blank Circuit Boards Blank PCBs are used in every electronic device after component assembly: Application Area Example Products Consumer Electronics Smartphones, TVs, Laptops Automotive Engine control units, LED lights, dashboards Industrial Automation PLCs, control modules Medical Devices Imaging systems, diagnostic equipment Telecommunications Routers, base stations, antennas LED Lighting Light strips, high-power LEDs Aerospace & Defense Navigation, radar, avionics 6. Future Trends • Miniaturization: More HDI and multilayer designs. • Flexible Electronics: Growth of wearable and foldable devices. • Thermal Management: Metal-core and ceramic PCBs for high-power circuits. • Eco-friendly Materials: Lead-free, halogen-free laminates gaining adoption. Summary Blank circuit boards are the foundation of modern electronics.Their type and material depend on performance, cost, and environmental needs.Through advanced manufacturing (like LDI, multilayer

  5. lamination, and ENIG finishing), companies like SQPCB produce reliable boards for industries ranging from LED lighting to aerospace.

More Related