PewCB

Product Introduction

1. Definition: The PewCB One is a desktop laser-based PCB (Printed Circuit Board) prototyping system. It is a hardware device that uses a high-precision laser to directly fabricate circuit boards from pre-manufactured ceramic blanks, enabling rapid in-house PCB creation.
2. Core Value Proposition: PewCB exists to eliminate the multi-week lead times associated with traditional PCB fabrication services. Its core value is enabling rapid hardware iteration, allowing engineers and developers to move from a design file (Gerber) to a functional, assembled prototype in approximately 30 minutes, directly on their desk.

Main Features

1. Laser-Based Subtractive Fabrication: The system uses a 1064 nm, 20W pulsed laser with a 35 µm spot diameter to selectively ablate (remove) copper and ceramic substrate from a pre-fabricated blank. This process defines traces, pads, and isolation gaps with a resolution of 2 µm and a repeatability of 30 µm, capable of producing 0.1 mm traces and spacing.
2. Integrated Via Grid & Double-Sided Blanks: PewCB solves the desktop double-sided PCB challenge using proprietary ceramic blanks (23x23mm to 84x84mm) with a pre-fabricated grid of plated through-hole (PTH) vias and peripheral mounting holes. Engineers route traces to the nearest via in the grid for layer transitions, bypassing the need for manual drilling or chemical electroplating.
3. On-Demand Laser-Cut Stencils: For assembly, a unique "malleable stencil" process is used. A single-use tin sheet is attached to the fabricated PCB, and the laser cuts solder paste apertures directly aligned to the pads. This ensures perfect alignment, deposits a protective tin layer on the copper pads, and accelerates paste application without manual fiducial alignment.
4. Desktop-Safe & Enclosed Operation: The device is a Class 1 laser-safe, fully enclosed metal chassis (155x290x464mm, 11kg) with a three-stage filtration system (G4, F7, activated carbon) to contain fumes and particulates. It operates from a standard wall outlet (200W), requiring no dedicated lab space, fume hood, or hazardous chemicals.
5. Automatic Optical Calibration: A patented photodetector-array system performs automatic optical calibration before each job. This compensates for optical distortions across the entire work area, ensuring beam positioning accuracy and consistent fabrication quality.

Problems Solved

1. Pain Point: The "hardware lag" or long iteration cycles in electronics development. While software can be compiled in seconds, hardware prototypes often wait 1-2 weeks for external PCB fabrication, stifling innovation and slowing time-to-market.
2. Target Audience: Hardware R&D engineers, embedded systems developers, product design teams, electronics researchers, and engineering educators. Specifically, professionals working with modern SMD components (e.g., QFN packages with 0.5mm pitch, 0201 passives) who need to validate concepts, test subsystems, or create one-off adapter boards rapidly.
3. Use Cases:
   • Functional Subsystem Validation: Quickly fabricating and testing power supplies, sensor interfaces, or RF sections before final product integration.
   • Agile Hardware Development: Enabling "fail fast" methodologies with 3+ PCB iterations in a single day instead of 2 per month.
   • Educational Labs: Allowing students to complete a full hardware development cycle (design, fab, assembly, test) within a single lab session.
   • Bridge/Adapter Boards: Creating one-off test jigs, programming interfaces, or measurement helpers on-demand.

Unique Advantages

1. Differentiation vs. Traditional Methods: Unlike outsourced fabrication (slow) or other desktop methods like CNC milling (limited precision, debris) or chemical etching (messy, hazardous), PewCB offers a clean, precise, and fast laser process. Compared to other laser systems, its use of pre-masked ceramic blanks with an integrated via grid is a key differentiator for double-sided boards.
2. Key Innovation: The combination of ceramic substrate blanks with a pre-fabricated via grid and the laser-cut malleable stencil system. This integrated materials-and-software approach solves the two biggest hurdles of desktop prototyping: reliable layer interconnection and precise, hassle-free solder paste application for assembly.

Frequently Asked Questions (FAQ)

1. What are the material limitations of PewCB compared to standard FR4 PCBs? PewCB uses ceramic substrates (alumina or zirconia) instead of standard FR4. Ceramic offers superior thermal and high-frequency performance but is more brittle and has higher thermal conductivity, which can make hand-soldering large components challenging without preheating.

2. Can PewCB create plated through-holes (PTHs) or vias anywhere on the board? No, not arbitrarily. The system relies on a pre-defined grid of vias within the blank. Engineers must route to the nearest available via. For custom via locations, the system supports laser-drilling holes for manual rivet insertion, and the peripheral PTH rows can also be used.

3. How does PewCB handle solder mask, and are there risks of solder bridging? Blanks come with pre-applied solder mask (red/blue). The laser removes mask where copper is ablated, which can expose trace edges near pads. In dense areas, this may risk solder bridging. The recommended solution is to use the provided laser-cut stencil for precise paste application. A UV-curable solder mask pen (sold separately) can be used for additional protection.

4. Is the PewCB system safe to use in a standard office or classroom environment? Yes. It is designed as a Class 1 laser product, meaning it is fully enclosed and safe during operation with no laser safety precautions required by the user. The integrated filtration system removes fumes and particulates, making it suitable for desktops, labs, and classrooms.

5. What is the total cost of ownership, considering consumables like blanks and stencils? The PewCB One system has an early bird price of $4990. Consumable costs include PCB blanks (e.g., $139 for 20x 53x53mm) and stencil sheets ($20 for 20 sheets). The operational cost is primarily these consumables, with no chemicals or special tooling required.