A disciplined, turnkey-ready process built for speed and reliability

At SAYFU, fast turnaround is not the result of shortcuts.
It is the outcome of a well-structured workflow, strong engineering involvement, and seamless turnkey coordination.

From bare board fabrication to full turnkey PCB assembly, every project is managed through a transparent process that connects Sales, Engineering, Supply Chain, QA, and Production from first inquiry to final delivery.

Step 1 | Rapid Quotation & Scope Alignment

Clear scope from day one

• Accurate quotation within 2 hours
• Support for bare PCB, partial turnkey, or full turnkey PCBA
• Early review of design files, BOM, and assembly requirements
• Clear confirmation of lead time, cost, and manufacturing scope

Fast response, with no hidden assumptions.

Step 2 | DFM / DFA Engineering Review

Design validated for fabrication and assembly

• Pre-sale DFM / DFA analysis using advanced pre-production systems
• Optimized layout, stack-up, and assembly suggestions
• Early risk identification for HDI, quick-turn, and turnkey projects

Engineering alignment before materials are ordered.

Step 3 | Turnkey Planning & Supply Chain Coordination

Materials, process, and schedule fully aligned

• BOM verification and component sourcing support
• Approved alternatives (AVLs) confirmed when needed
• Clear MI (Manufacturing Instructions) covering fabrication and assembly
• Coordinated planning across Engineering, QA, PMC, and Supply Chain

One plan. One owner. One timeline.

Step 4 | Fabrication & Assembly Execution

Built right, under one roof

• PCB fabrication strictly follows approved MI
• SMT, through-hole (DIP), and mixed-technology assembly
• Real-time process control at key fabrication and assembly stages
• Single responsibility for quality and delivery

Turnkey manufacturing without fragmented accountability.

Step 5 | In-Process & Final Quality Control

Quality controlled end to end

• In-process inspections for fabrication and assembly
• AOI, visual inspection, and functional checks as required
• Final outgoing quality inspection before shipment
• Full traceability from bare board to assembled product

One quality standard across the entire process.

Step 6 | Delivery & Ongoing Engineering Support

Support beyond production

• On-time delivery as standard
• Direct engineering and technical communication
• Continuous support for design revisions, cost-down, and scaling

We support both your prototype phase and your next production step.

Our Focus & Capabilities

Quick Turn, HDI & Turnkey PCBA

SAYFU specializes in Quick Turn Prototype and HDI projects for
small to medium volume production, including partial and full turnkey manufacturing.

Core PCB Technologies

• Multilayer Rigid PCB
• HDI (High Density Interconnect) PCB
• Heavy Copper PCB
• High Frequency / RF PCB (Rogers, Teflon, Ceramic)

Turnkey Manufacturing Services

• PCB Fabrication
• Component Sourcing & BOM Management
• SMT Assembly
• Through-Hole (DIP) Assembly
• Mixed-Technology & Complete Board Assembly

Quality System

Consistency across fabrication, assembly, and supply chain

SAYFU operates under an ISO 9001 certified quality management system, ensuring controlled processes, traceability, and continuous improvement across both PCB fabrication and turnkey PCBA services.

Three principles to meet quality policy:

CUSTOMER ORIENTED
QUALITY ADHERENCE
CONTINUOUS BREAKTHROUGH

Test Item	Equipment
Solder Ability Test	Solder Machine
Copper peel strength test	Peel strength tester
Bow/ Twist test	Pin gauge
Copper thickness in hole wall	CMI/section
Surface copper thickness	CMI/section
Micron Section	Metallographic microscope
X-ray test	CMI 900
Impedance test	Polar SI9000
Ionic contamination	Ionic contamination machine
Dimension	3D inspection instrument
Hi-pot	Hi-pot tester
Delamination	IR-Reflow