High-Tg PCB
Table of Content
- Compare the thermal properties that matter to your board
- Select a grade, then control changes through assembly
- Every bare PCB receives flying-probe electrical testing
- From bare boards to genuine-component turnkey PCBA
- Nine PCBA quality stages with an agreed test scope
- Plan delivery from the complete release package
- Request a High-Tg PCB review
- High-Tg PCB questions
ORINEWPCB · FABRICATION TO TURNKEY ASSEMBLY
High-Tg PCB manufacturing uses a laminate selected for its glass transition behavior and the wider thermal requirements of the design. Tg is not the maximum continuous operating temperature of the finished board. Specify the material grade and thermal conditions instead of relying on one Tg number.
Compare the thermal properties that matter to your board
Thermal selection involves more than surviving a single soldering event. Material decomposition behavior, expansion, moisture condition, board structure and the planned assembly process can all matter. The suitable construction must be reviewed against the actual operating environment and manufacturing history.
On a small screen, swipe the table horizontally. Keyboard users can focus the table region and use the arrow keys.
| Decision | Send or confirm | Why it matters |
|---|---|---|
| Tg and test method | Required glass transition value, measurement method and approved laminate grade. | Values measured by different methods should not be treated as directly identical. |
| Decomposition and expansion | Relevant Td, z-axis CTE and material thermal data. | A high Tg alone does not establish via reliability or thermal durability. |
| Assembly heat exposure | Planned soldering process, repeated cycles and possible rework. | Material and construction should be reviewed for the actual thermal history. |
| Operating conditions | Expected board temperatures, duty cycle and product qualification needs. | Tg is not an automatic service-temperature rating. |
| Electrical and mechanical needs | Stack-up, copper, impedance, thickness and critical tolerances. | Thermal improvements must not overlook the rest of the board specification. |
Select a grade, then control changes through assembly
A request such as “high Tg” leaves room for different resin systems and properties. Identify a preferred grade or the performance criteria that an alternative must meet. If delivery pressure triggers a material change, review it before production; a higher headline Tg does not automatically make an alternative suitable.
- Provide the fabrication drawing, layer stack and required material properties.
- Describe relevant operating temperatures and assembly/rework exposure.
- Identify critical plated-through holes, dense packages and other reliability concerns.
- Agree required documentation or qualification evidence separately from routine electrical testing.
- For turnkey builds, align the PCB material, component handling and agreed assembly process.
Every bare PCB receives flying-probe electrical testing
OrinewPCB flying-probe tests every bare PCB we manufacture, not just a sample. This checks the conductive networks against the electrical test data. Include your netlist where available and identify any required test parameters or records in the RFQ.
An electrical pass does not establish every physical characteristic, controlled impedance, RF performance, thermal reliability or finished-product function. Specify those requirements and any additional evidence separately. This keeps the acceptance scope clear before fabrication begins.
From bare boards to genuine-component turnkey PCBA
Keep the fabrication, BOM purchasing and assembly review connected when you need a finished assembly. Small-to-medium batches and high-mix turnkey PCB assembly are a particular OrinewPCB strength. List quantities and differences for each design or variant so the release is unambiguous.
We supply and use 100% brand-new, original, genuine electronic components for customers’ turnkey assemblies. Our cooperation with manufacturers and distributors helps us seek competitive BOM pricing and practical lead times. Exact MPNs, current availability, permitted sources and delivery dates are checked for your project; alternatives require customer approval.
Bare PCB supply
Release the fabrication data, quantity, acceptance scope and delivery needs.
BOM sourcing
Send full manufacturer part numbers, quantities, approved alternatives and documentation needs.
One-stop assembly
Combine fabrication, sourcing, assembly and the agreed inspection or test plan.
Explore one-stop PCB assembly, electronic component sourcing and the OrinewPCB brand website.
Nine PCBA quality stages with an agreed test scope
When the order includes assembly, our quality workflow covers nine stages. The applicable inspection plan and evidence are agreed for the actual build:
- IQC: incoming materials.
- SPI: solder paste inspection.
- Online AOI: in-line optical inspection.
- SMI: first-article inspection.
- IPQC: in-process quality checks.
- Offline AOI: post-solder optical inspection.
- X-ray: hidden joints to the agreed scope.
- Manual QC: workmanship review.
- Pre-shipment QA: identification, quantity and packaging.
These are nine quality stages, not nine functional tests. Programming, ICT, functional testing or application-specific validation need an agreed procedure, access or fixtures, and pass/fail criteria. See our factory and quality workflow.
Plan delivery from the complete release package
We work toward the earliest practical delivery for the approved scope. Send the required quantity, design variants and target date, and state whether it means production completion, dispatch or arrival. Materials, engineering questions, assembly preparation and agreed tests all affect the confirmed schedule.
Compare quotations using the same material, revision, sourcing responsibility and acceptance scope. A lower bare-board or placement line item is not automatically a lower complete project cost.
Related planning: Halogen-free material requirements · Standard PCB fabrication · One-stop PCB assembly scope.
Request a High-Tg PCB review
Send OrinewPCB your files and tell us what you need: bare boards, BOM sourcing or a complete turnkey assembly. Files are optional for an initial discussion.
- Board files, drawing revision and special material or construction requirements
- Quantity per design or variant and repeat-order expectations
- BOM with full MPNs, placement and assembly drawings if assembly is needed
- Inspection, programming, functional-test and documentation requirements
- Target date, delivery destination and any staged shipment needs
For direct email: [email protected]. A quote request does not authorize purchasing, substitutions or production.
High-Tg PCB questions
Is a 170°C Tg board rated for continuous operation at 170°C?
No. Tg describes a material transition and is not the complete product’s continuous operating-temperature rating. Review the laminate’s relevant ratings and the product’s thermal and reliability requirements.
Does higher Tg always mean better thermal conductivity?
No. Tg and thermal conductivity describe different properties. If heat transfer is a design concern, specify the relevant thermal requirements separately.
Does flying-probe testing replace thermal qualification?
No. Bare-board electrical testing and thermal or reliability qualification answer different questions. State any additional qualification and evidence requirements in the RFQ.
Related Posts
ORINEWPCB · PROJECT SUPPORT
Contact Us
Discuss your PCB assembly project with our team.
FREE QUOTE
Plan your turnkey PCBA build.
Share your quantity and requirements. Add Gerber files and a BOM when ready.
Files are optional for an initial discussion. Include any assembly, sourcing or testing requirements in your message.
