The cost of printed circuit board (PCB) assembly in San Diego depends on various factors such as:
Size and Complexity of the PCB
Larger PCB sizes and more complex board designs require more sophisticated assembly equipment, rigorous testing, and highly skilled technicians which drives up fabrication costs. High density boards with thousands of tiny surface mount components need precision pick-and-place machines, advanced soldering gear (vapor phase, selective wave) and special inspection cameras to ensure quality – all of which are substantial investments.
Boards destined for high reliability military systems, aerospace, medical, automotive or networking applications further have stringent quality demands necessitating robust process controls adding overhead.
Here are typical size-dependent assembly costs:
- Small Board (<100 cm2 ) – $100 to $3000
- Medium board (100 – 500 cm2) – $3000 to $10000
- Large board (> 500 cm2) – $10000 to $30000
Of course, optimized layouts can pack maximal functionality into smallest space winning cost savings.
Component Types
- Through-hole parts allow easy insertion by hand or using basic machines to clinch leads needing only simple solder bath/iron melting to assemble boards.
- Tiny surface-mount parts as small as 0201 size (0.6mm x 0.3mm) require advanced pick-and-place gear for high precision automated population.
- Sensitive components like Microcontrollers, FPGAs, RF modules need programming during assembly.
- High pin count BGAs, connectors demand complex soldering tools.
Such exotic parts increase production infrastructure costs.
Layer Count
Boards with more copper layers for dense integrated circuit tracing and routing present fabrication challenges needing layer alignment precision during lamination presses and drilling. High layer counts also require thorough testing using X-ray imaging, computed tomography and electrical probing to validate interconnections.
| Layer Count | Typical Assembly Cost |
|---|---|
| Single Sided | $100 to $1500 |
| Double Sided | $1000 to $3500 |
| 4-6 Layers | $3000 to $8000 |
| 8+ Layers | $5000 to $15000 |
Quantity Manufactured
Low volume prototyping pcb carries higher unit cost from specialized setups, production runs, tooling and testing across tens to hundreds of boards.
Medium scale batches from hundreds to thousands of boards distribute costs through economies of scale.
High volumes above 5000 boards optimize pricing through streamlined automation across ordering components, solder paste printing, component loading, reflow soldering, cleaning, testing and inspection. Amortizing expenses over total builds decreases per board costs.
Lead Times
- Fast turnaround <5 days costs extra with round the clock shifts
- Normal build time is 2-4 weeks
- Lower priority >4 weeks jobs are most economical
Rushing boards cuts production optimization causing cost premiums.
Post Assembly Processing Needs
Additional downstream value additions like enclosure fabrication/painting, cabling, programming firmware into boards or full-system integration testing further increase project budgets.
Location Factors
San Diego hosts dozens of PCB assembly houses catering from university lab prototypes to advanced military systems with capacity matching wide budgets. This healthy competition helps benchmark pricing. Selected established vendors include:
- Advanced Assemblyย โ 10,000 sq ft state-of-art facility with automated optical inspection (AOI) and X-ray abilities for verifying PCBA integrity. 25+ years pedigree specializing in intricate RF designs.
- Eurocircuitsย – Coastal European company expanded offshore with double sided mainstream printed circuit board assembly service.
- Imagineeringย – Woman-owned prototyping leader since 1993 renowned for quick turn assemblies of highly dense boards thanks to robotic solder jetting systems.
- Screaming Circuitsย – Founded in 2003 focusing on small run testing and verification builds before mass production overseas to de-risk design bugs.
Indeed most assembly providers here leverage close ties with abundant Southern California electronics innovators crafting cutting edge products needing rapid realization. Mixture of old and new vendors thus assures healthy capacity.
Proximity with minimal shipping or freight delays as well as easier accounting through shared time zones also makes local turnkey assembly attractive for responsive Southern California OEMs especially dealing with sensitive defense technologies.
While lacking the sheer capacity or ultra-low rates of Asian locations, San Diego region balances responsiveness and security while tapping experienced talent.
Cost Saving Approaches
Prudent design and sourcing best practices mitigate assembly expenses through:
1. Design for Manufacturability
Simplify layouts keeping components on one side, reducing layer counts, allowing direct SMT parts instead of connectors to streamline fabrication. Standardize frequently used functional blocks like power supply, USB interface as modular building blocks across projects lowering costs through reuse while accelerating market launches.
2. Component Selection
Leverage commonly available commodity parts in volume production instead of hard-to-source boutique niche components to avoid supply bottlenecks.
3. Supplier Diversification
Split manufacturing loads across locations and providers using different technologies to mitigate regional risks from disasters, trade wars etc ensuring production continuity.
4. Group Sourcing
Clubbing assembly projects across internal product teams or by partnering with other firms increases aggregate board volumes qualifying for quantity discounts from assembly partners.
5. Design Reuse
Spin off fresh products variants by judiciously reusing proven reliable blocks from existing boards and updating only specific sections requiring enhancements for fast development.
Together these techniques realize savings which can balance some higher labour rates associated with advanced Californian assembly houses.
Indeed by co-operating across value chain partners, pooling volumes and maximizing reuse, buyers avail quality boards on time while providers better amortize Capex investments through steadier utilization. Such symbiotic collaboration sustains the local PCB assembly ecosystem while containing costs.
Assembly Cost Breakdown
Below table approximates typical cost distribution proportions:
| Expense Category | Percentage |
|---|---|
| PCB Fabrication | 55% |
| Components | 20% |
| Assembly | 10% |
| Test/Inspection | 5% |
| Shipping/Overheads | 10% |
Hence majority cost depends on board fabrication selected. Component selections needing expensive programmable logic ICs, FPGAs or RF front-ends will however shift this split raising aggregate price tags.
Frequently Asked Questions
Q1. Does assembly cost increase for double-sided PCBs?
Yes, double sided PCB assembly costs are higher than single sided boards since components must be accurately mounted on both top and bottom requiring additional process steps like part nesting, multi-stage solder reflow and inspection twice over. Floor space for work-in-progress movement also escalates.
Q2. Can PCB functional testing done before assemble reduce cost?
Yes, testing blank boards first avoids wasting expensive component costs upfront before assembly for any failing boards through early detection of potential structural defects. This prevents scrapping fully stuffed boards later.
Q3. Does automated optical inspection eliminate post assembly testing needs?
No. While AOI quickly validates assembly integrity, additional comprehensive electrical testing under environmental loads still verifies full system operation within specifications. Both inspections hence remain complementary checking cosmetic flaws versus functional deviations respectively.
Q4. Why use local San Diego assembly versus offshore options?
Proximity to San Diego board houses speeds up potential prototype review/modifications across endless test-modify-validate cycles saving overall development costs despite higher per unit charges. Closer coordination and issue resolution is also faster averting delays.
Q5. Does San Diego support full box build assembly services?
Yes, leading Electronic Manufacturing Services (EMS) providers offer system integration soldering PCBAs into enclosures and loading relevant firmware locally easing logistics for regional OEMs to secure digital assets while economizing small batches.
Rising complexity demands ever advancing assembly techniques finely balancing production excellence with pricing pragmatism to sustain growth across diverse electronics domains!
