High Tg/Halogen-Free PCBs

Standard FR-4 materials can reach their performance limits in demanding applications.High Tg(Glass Transition Temperature)and Halogen-Free PCBs utilize advanced laminate formulations to overcome these challenges.

High Tg PCBs: Employ resins with a higher Glass Transition Temperature(Tg),the point at which the material transitions from a rigid to a soft state.A higher Tg(typically≥170°C)provides greater thermal,mechanical,and chemical stability,which is critical for surviving multiple lead-free soldering cycles and high-temperature operation.

Halogen-Free PCBs: Manufactured with laminates that eliminate or drastically reduce halogens—specifically Chlorine(Cl)and Bromine(Br)—used as flame retardants.These boards comply with environmental directives(like RoHS)and safety standards,producing less toxic smoke in case of combustion.

Why This Matters: Using these materials prevents delamination,via failures,and ensures your product is suitable for regulated markets and demanding operating conditions.

Choosing the right material requires understanding key parameters beyond Tg and halogen content.

Critical Performance Indicators:

SENTAK's Material Expertise: We work with leading laminate suppliers (Isola, Shengyi, ITEQ) to offer a range of High Tg, Halogen-Free, and combined High Tg Halogen-Free materials, ensuring the perfect match for your electrical, thermal, and compliance needs.

These materials solve specific,high-stakes problems across industries.

Demanding Thermal&Reliability Applications:

Lead-Free Assembly: Essential for withstanding the higher temperatures of SAC305 and other lead-free solder alloys.

Automotive Electronics: Under-hood control units,engine management systems,LED headlights(high power,high temperature).

Power Electronics: Power supplies,motor drives,and inverters where high operational temperatures are common.

Complex Multilayer Boards: Server motherboards,networking equipment,and base stations where thermal stress is cumulative.

Environmental Compliance&Safety-Critical Applications:

Consumer Electronics: Smartphones,laptops,tablets(driven by OEM sustainability mandates).

Medical Devices: Equipment requiring biocompatibility and safe disposal/recycling.

Public Infrastructure&Transportation: Devices where fire safety and low-toxicity emissions are paramount.

Designing with these materials follows standard rules,with a few critical emphases.

Clearly Specify Requirements: On your fabrication drawing,explicitly state“High Tg(≥170°C)”and/or“Halogen-Free(per IPC-4101/xxx)”.This eliminates ambiguity.

Thermal Management is Key: Even with High Tg materials,ensure adequate thermal relief for pads connected to large copper planes to facilitate proper soldering.

Consult Your Fabricator Early: Material selection impacts Dielectric Constant(Dk)and processing.Engage with our engineers during stack-up design for controlled impedance projects.

Leverage Our DFM Service: Submit your design for a Free DFM Review.We will verify compatibility with your chosen material and suggest optimizations.

We are equipped to process these advanced materials with the required controls.

Controlled Lamination: Precise temperature and pressure cycles to fully cure high-performance resins.

Drilling Expertise: Adjusted parameters for the often harder, more abrasive resin systems.

Full Compliance Support: Ability to provide material certification and documentation for your audits.