Ordering PCBs from fabricators in PCB Design - Full Explanation

Introduction

When you finish designing a printed circuit board (PCB), you need to get it made. Ordering PCBs from fabricators solves the problem of turning your design into a physical board you can use in your project.

Explanation

Preparing Design Files

Before ordering, you must prepare your design files correctly. This usually means exporting Gerber files, which contain all the layers and details the fabricator needs to make your PCB. These files must follow the fabricator's specifications to avoid errors.

Accurate and complete design files are essential for a successful PCB order.

Choosing Fabricator Options

Fabricators offer many options like board thickness, number of layers, surface finish, and solder mask color. Selecting the right options affects the board's quality, cost, and suitability for your project. You should balance your needs and budget carefully.

Selecting appropriate fabrication options ensures the PCB meets your project requirements.

Submitting the Order

Once files and options are ready, you submit your order through the fabricator's website or email. You usually upload your files, specify quantities, and pay. The fabricator then reviews your files and confirms the order before starting production.

Clear communication and correct submission prevent delays and mistakes.

Production and Shipping

After order confirmation, the fabricator manufactures your PCBs. This process can take days to weeks depending on complexity and quantity. Once done, the boards are shipped to your address. Tracking and delivery times vary by fabricator and shipping method.

Understanding production and shipping timelines helps plan your project schedule.

Real World Analogy

Imagine you designed a custom cake and want a bakery to make it. You give them a detailed recipe (design files), choose cake size and decorations (fabricator options), place your order, and then wait for the bakery to bake and deliver your cake.

Preparing Design Files → Giving the bakery a clear, detailed recipe so they know exactly how to make your cake

Choosing Fabricator Options → Picking cake size, flavor, and decoration to match your taste and budget

Submitting the Order → Placing the order with the bakery and confirming details to avoid mistakes

Production and Shipping → The bakery baking the cake and delivering it to your home

Diagram

Diagram

┌─────────────────────┐
│  Prepare Design Files│
└──────────┬──────────┘
           │
┌──────────▼──────────┐
│ Choose Fabricator   │
│ Options             │
└──────────┬──────────┘
           │
┌──────────▼──────────┐
│ Submit Order to     │
│ Fabricator          │
└──────────┬──────────┘
           │
┌──────────▼──────────┐
│ Production & Shipping│
└─────────────────────┘

This diagram shows the step-by-step flow from preparing design files to receiving the finished PCBs.

Key Facts

Gerber Files → Standard files that describe each layer of a PCB design for fabrication.

Board Thickness → The physical thickness of the PCB, affecting strength and fit.

Surface Finish → The coating on PCB pads that affects solderability and durability.

Solder Mask → A protective layer that covers the PCB except where components are soldered.

Turnaround Time → The time a fabricator takes to produce and ship the PCBs after order confirmation.

Common Confusions

Believing that sending design files alone guarantees correct PCB production.

Believing that sending design files alone guarantees correct PCB production. Fabricators need files in specific formats and with correct settings; incomplete or wrong files cause errors or delays.

Assuming all fabricators offer the same options and quality.

Assuming all fabricators offer the same options and quality. Fabricators differ in capabilities, options, and quality; choosing one that fits your project is important.

Expecting instant delivery after ordering.

Expecting instant delivery after ordering. PCB manufacturing and shipping take time; planning ahead avoids project delays.

Summary

Ordering PCBs requires preparing accurate design files that meet fabricator requirements.

Choosing the right fabrication options balances quality, cost, and project needs.

Understanding the order process and production time helps avoid delays and errors.

Practice

1. What is the primary purpose of ordering PCBs from fabricators?

easy

A. To simulate electronic circuits on a computer

B. To turn your design into a physical board for testing or production

C. To create 3D models of the PCB

D. To write software code for the PCB

Solution

1. Step 1: Understand the role of PCB fabrication

   PCB fabrication is the process of making a physical printed circuit board from a design.

2. Step 2: Identify the purpose of ordering PCBs

   Ordering PCBs from fabricators allows you to get a real board for testing or production use.

3. Final Answer:

   To turn your design into a physical board for testing or production -> Option B

4. Quick Check:

   PCB ordering = physical board creation [OK]

Hint: PCB fabrication means making a real board from your design [OK]

Common Mistakes:

• Confusing PCB fabrication with software coding
• Thinking PCB ordering creates simulations
• Assuming it produces 3D models instead of physical boards

2. Which of the following file types is essential to provide when ordering PCBs from fabricators?

easy

A. JPEG images

B. Word documents

C. Gerber files

D. MP3 audio files

Solution

1. Step 1: Identify the standard file format for PCB fabrication

   Gerber files contain the detailed layer information needed by fabricators to produce PCBs.

2. Step 2: Compare with other file types

   JPEG, Word, and MP3 files do not contain PCB manufacturing data and are irrelevant for fabrication.

3. Final Answer:

   Gerber files -> Option C

4. Quick Check:

   Gerber files = PCB manufacturing data [OK]

Hint: Gerber files are the PCB blueprint for fabricators [OK]

Common Mistakes:

• Submitting image files instead of Gerber files
• Confusing documentation files with fabrication files
• Not knowing the correct file format for PCB production

3. You have two fabricators: Fabricator A charges $50 for 10 PCBs with 7 days delivery, Fabricator B charges $40 for 10 PCBs with 14 days delivery. If you need the PCBs urgently, which fabricator should you choose?

medium

A. Fabricator A because of faster delivery

B. Fabricator B because it is cheaper

C. Either one, delivery time does not matter

D. Order from both to compare quality

Solution

1. Step 1: Analyze delivery times

   Fabricator A delivers in 7 days, Fabricator B in 14 days.

2. Step 2: Consider urgency

   If PCBs are needed urgently, faster delivery is more important than cost.

3. Final Answer:

   Fabricator A because of faster delivery -> Option A

4. Quick Check:

   Urgent need = choose faster delivery [OK]

Hint: Urgent orders need faster delivery, not just cheaper price [OK]

Common Mistakes:

• Choosing cheaper option despite urgent need
• Ignoring delivery time importance
• Thinking ordering both is always best

4. You submitted Gerber files to a fabricator but received an error saying files are incomplete. What is the most likely cause?

medium

A. Missing one or more required Gerber layers

B. Files are too large in size

C. You sent JPEG images instead of Gerber files

D. The fabricator does not accept Gerber files

Solution

1. Step 1: Understand Gerber file requirements

   Fabricators require all necessary layers (copper, solder mask, silkscreen, etc.) to produce PCBs.

2. Step 2: Identify common error cause

   An incomplete set of Gerber layers causes errors during file validation.

3. Final Answer:

   Missing one or more required Gerber layers -> Option A

4. Quick Check:

   Incomplete Gerber layers = error [OK]

Hint: Check all required Gerber layers are included before submitting [OK]

Common Mistakes:

• Assuming file size causes error
• Sending wrong file types
• Thinking fabricators reject Gerber files

5. You want to order 50 PCBs with the following specs: 2-layer board, 1.6mm thickness, HASL finish, and 0.8mm minimum trace width. Which step should you take to ensure the fabricator can meet these requirements?

hard

A. Ask the fabricator to decide the specs after receiving the files

B. Send only the Gerber files without any specification details

C. Order the PCBs without confirming specifications to save time

D. Check the fabricator's specification sheet for supported thickness, layers, finish, and trace width

Solution

1. Step 1: Understand importance of specification matching

   Fabricators have limits on board thickness, layers, finishes, and trace widths they can produce.

2. Step 2: Verify fabricator capabilities

   Reviewing the fabricator's specification sheet ensures your requirements are supported before ordering.

3. Final Answer:

   Check the fabricator's specification sheet for supported thickness, layers, finish, and trace width -> Option D

4. Quick Check:

   Confirm specs with fabricator before ordering [OK]

Hint: Always verify fabricator specs match your PCB requirements [OK]

Common Mistakes:

• Assuming fabricator can produce any specs
• Not communicating specs clearly
• Relying on fabricator to guess requirements