ZY High Frequency PCB Material: A Rogers Alternative for Cost-Sensitive Projects

ZYF220D — Ultra-Low Dk PTFE (Dk 2.20)

ZYF220D is the lowest-Dk grade in the ZY range, targeting the same Dk segment as Rogers RT5880 (Dk 2.2). It is a PTFE-based laminate with very low dielectric loss, suitable for applications requiring the maximum electrical wavelength on the board and minimum dielectric loss.

• Dk: 2.20 ±0.02 — tight tolerance, comparable to Rogers RT5880 specification
• Df: 0.0009 — same loss tangent as Rogers RT5880 at 10 GHz
• Available thicknesses: 0.254 / 0.381 / 0.508 / 0.762 / 1.016 / 1.524 mm
• PTFE base — requires sodium or plasma activation before copper plating
• Applications: wide-band low-loss RF circuits, EW receivers, broadband antenna feed networks
• Rogers equivalent: Rogers RT5880 (Dk 2.2, Df 0.0009)

ZYF225DA — Low Dk PTFE (Dk 2.55)

ZYF225DA fills the Dk 2.55 segment between ZYF220D and ZYF265D. It targets applications that need lower Dk than standard 3.0–3.5 materials but do not require the ultra-low Dk of ZYF220D.

• Dk: 2.55 ±0.04
• Df: 0.0018
• Available thicknesses: 0.254 / 0.381 / 0.508 / 0.762 / 1.016 / 1.524 mm
• Applications: medium frequency RF circuits, compact antenna designs

ZYF265D — Mid-Range PTFE (Dk 2.65)

ZYF265D is a PTFE-based laminate with Dk of 2.65, similar to Rogers materials in the Dk 2.6–2.7 range. It offers lower Dk than the ZYF300CA while maintaining the PTFE-base low loss performance.

• Dk: 2.65 ±0.04
• Df: 0.0018
• Available thicknesses: 0.254 / 0.381 / 0.508 / 0.762 / 1.016 / 1.524 mm
• Applications: RF circuits requiring intermediate Dk between 2.2 and 3.0

ZYF300CA-P — Standard RF PTFE (Dk 3.00)

ZYF300CA-P is the most widely used ZY material, targeting the same Dk segment as Rogers RO3003 (Dk 3.0). It is the ZY grade most directly comparable to the most common Rogers material for defense and commercial radar PCB.

• Dk: 3.00 ±0.05 — comparable to Rogers RO3003 Dk 3.0 ±0.04
• Df: 0.0018 — slightly higher than Rogers RO3003 (Df 0.0010)
• Available thicknesses: 0.381 / 0.508 / 0.762 / 1.016 / 1.524 / 3.170 mm
• PTFE base — requires special hole wall preparation before plating
• Applications: commercial radar, industrial microwave sensors, VSAT terminals, RF modules
• Rogers equivalent: Rogers RO3003 (Dk 3.0, Df 0.0010) — note Df difference

ZYF350CA — Higher Dk PTFE (Dk 3.50)

ZYF350CA has Dk of 3.50, comparable to Rogers RO4350B and Taconic RF-35. It is used for applications that need a moderately higher Dk material for compact circuit designs.

• Dk: 3.50 ±0.05 — comparable to Rogers RO4350B (Dk 3.48) and Taconic RF-35 (Dk 3.5)
• Df: 0.0031 — slightly lower loss than Rogers RO4350B (Df 0.0037)
• Available thicknesses: 0.254 / 0.381 / 0.508 / 0.762 / 1.016 / 1.524 mm
• Applications: commercial radar, cost-sensitive RF PCB at C-band to X-band
• Rogers equivalent: Rogers RO4350B (Dk 3.48, Df 0.0037)

  ZY vs Rogers: Key Differences to Understand Before Specifying

  ZY materials are designed to match the key electrical parameters of Rogers materials, but there are important differences in Dk tolerance, Df, temperature stability, documentation, and qualification status that buyers must understand before specifying ZY as a Rogers alternative.

  Dk Tolerance Comparison

  Dk tolerance is the allowed variation in dielectric constant from the nominal value. Tighter Dk tolerance means more consistent impedance and antenna performance across production lots.

  • ZYF220D: Dk 2.20 ±0.02 — matches Rogers RT5880 (Dk 2.2 ±0.02)
  • ZYF300CA-P: Dk 3.00 ±0.05 — slightly wider than Rogers RO3003 (Dk 3.0 ±0.04)
  • ZYF350CA: Dk 3.50 ±0.05 — slightly wider than Rogers RO4350B (Dk 3.48 ±0.05)

  For most commercial RF applications, the Dk tolerance difference between ZY and Rogers is small enough to have minimal practical impact on circuit performance. For phased array antenna designs where Dk consistency between lots affects beam quality, Rogers materials with their established lot-to-lot consistency are preferred.

  Df Comparison — The Most Important Difference

  Df (loss tangent) is the most significant performance difference between ZY and Rogers for some grades. Lower Df means lower insertion loss per unit length of transmission line.

  • ZYF220D Df: 0.0009 — matches Rogers RT5880 (Df 0.0009)
  • ZYF300CA-P Df: 0.0018 — higher than Rogers RO3003 (Df 0.0010)
  • ZYF350CA Df: 0.0031 — slightly lower than Rogers RO4350B (Df 0.0037)

  The Df difference between ZYF300CA-P (0.0018) and Rogers RO3003 (0.0010) is the most significant practical difference in the ZY range. For applications where insertion loss is critical — such as long antenna feed networks, EW receivers, or high-frequency radar — Rogers RO3003 provides approximately 45% lower Df. For applications where feed line lengths are short and insertion loss budget is less critical, ZYF300CA-P may be adequate.

  Temperature Stability

  Both ZY and Rogers PTFE materials have no glass transition temperature concern within the standard operating temperature range. However, the Dk temperature coefficient and CTE values of ZY materials are less comprehensively documented than Rogers materials, which have extensive published performance data across temperature.

  • ZY materials: PTFE base — no Tg concern in standard RF PCB operating range
  • Dk temperature coefficient: less published data than Rogers — must confirm with ZY material supplier
  • For wide temperature range applications (-55°C to +125°C): Rogers materials preferred due to better documented temperature performance

  Material Documentation and Certification

  For commercial applications, ZY materials typically come with a standard certificate of conformance. For aerospace, defense, and precision applications requiring Rogers-certified documentation, lot traceability to Rogers Corporation, or program-specific material qualification, ZY materials are not a substitute.

  • ZY materials: standard CoC available — not Rogers Corporation certified
  • Rogers materials: Rogers Corporation CoC, lot number traceability, published technical data sheets
  • Aerospace and defense programs: typically require Rogers-certified materials — ZY not qualified for IPC Class 3 defense programs in most cases
  • Commercial programs: ZY CoC adequate for most commercial RF PCB applications

  Important: If a customer’s design specification explicitly calls out Rogers material by grade (e.g. ‘Rogers RO3003’ or ‘Rogers RO4350B’), ZY material cannot be substituted without the customer’s written approval of the material change. Always confirm with the buyer before substituting ZY for a Rogers-specified material.

  Applications Where ZY Materials Are Suitable

  ZY high frequency materials are best suited for applications where cost is a significant constraint, Rogers-certified documentation is not required, and the slightly wider Dk tolerance and higher Df of some ZY grades are acceptable for the circuit performance requirements.

  Commercial RF Modules and Industrial Sensors

  Commercial RF transceivers, industrial microwave level sensors, proximity sensors, and motion detection radar typically do not require Rogers-certified materials. ZYF300CA-P or ZYF350CA at C-band to X-band provides adequate performance for these applications at lower material cost.

  • Industrial ISM band radar (5.8 GHz, 10.5 GHz, 24 GHz): ZYF300CA-P or ZYF350CA
  • Commercial microwave motion sensors: ZYF350CA adequate at lower frequencies
  • Industrial level measurement radar: ZYF300CA-P for most C-band to X-band designs
  • Cost saving: typically 20–40% lower material cost than Rogers equivalent

  VSAT and Commercial Satellite Ground Terminals

  Commercial VSAT terminals at Ku-band may use ZYF300CA-P as a cost-sensitive alternative to Rogers RO3003 where the higher Df is within the link budget margin. For Ka-band terminals where every dB matters, Rogers RO3003 or RT5880 is preferred.

  • Ku-band commercial VSAT (10–14 GHz): ZYF300CA-P may be adequate for short feed networks
  • Ka-band terminals (17–31 GHz): Rogers RO3003 preferred — Df difference more significant at higher frequency
  • Cost-sensitive consumer terminal applications: ZYF300CA-P worth evaluating

  Commercial 5G and Wireless Infrastructure

  Commercial 5G base station RF PCB operating at sub-6 GHz bands may use ZY materials for non-critical RF sections. Millimeter-wave 5G (24–28 GHz, 37–40 GHz) requires lower loss and tighter Dk tolerance — Rogers materials preferred.

  • Sub-6 GHz 5G RF PCB: ZYF300CA-P or ZYF350CA for cost-sensitive sections
  • mmWave 5G (24–40 GHz): Rogers RO3003 or RT5880 preferred

  Applications Where Rogers Is Strongly Preferred

  • Aerospace and defense: IPC Class 3, military standards, Rogers-certified traceability required
  • Phased array radar with tight beam accuracy requirements: Rogers lot-to-lot Dk consistency critical
  • EW systems requiring minimum insertion loss across 2–18 GHz: Rogers RT5880 Df 0.0009 preferred over ZYF220D Df 0.0009 — Rogers better documented
  • Wide temperature range (-55°C to +125°C): Rogers better published temperature performance data
  • Any program with Rogers specified by grade on the fabrication drawing: ZY requires customer approval for substitution

  Manufacturing Considerations for ZY High Frequency PCB

  ZY materials are PTFE-based laminates and require the same specialized manufacturing processes as other PTFE materials. The manufacturing challenges and process requirements are similar to Rogers PTFE materials.

  PTFE Process Requirements

  • Hole wall activation: sodium naphthalene or plasma etch before copper plating — same as Rogers PTFE materials
  • Drill parameters: PTFE-specific spindle speed and feed rate — standard FR4 parameters cause hole wall deformation
  • Lamination: maximum 2 press cycles for pure ZY PTFE stackups
  • Hybrid with FR4: ZY + FR4 hybrid follows same constraints as Rogers PTFE + FR4 hybrid
  • Bonding film: ZY-compatible bonding film required for ZY-to-FR4 hybrid stackups — confirm compatibility with manufacturer

  Controlled Impedance

  ZY materials support controlled impedance manufacturing with the same process as Rogers PTFE materials. Impedance coupons should be placed on the panel edge for TDR verification.

  • Impedance tolerance: ±10% standard — same as Rogers PTFE boards
  • Dk used for calculation: confirm actual production Dk from ZY material certificate — do not assume nominal value
  • Dk variation: ZY Dk tolerance slightly wider than Rogers in some grades — impedance calculation must account for tolerance range

  Surface Finish Compatibility

  • ENIG: standard choice for ZY high frequency PCB — same as Rogers PTFE boards
  • ENEPIG: available for applications requiring wire bonding or highest reliability
  • Immersion silver: compatible — provides lowest pad resistance at millimeter-wave frequencies
  • OSP: generally not recommended for high frequency RF pads

  For PTFE manufacturing requirements, see PTFE PCB Manufacturing Challenges and Process Considerations. For surface finish selection, see ENIG vs ENEPIG vs Immersion Silver for High Frequency PCB.

  Information Needed for ZY High Frequency PCB Quotation

  To review feasibility and provide an accurate quotation for ZY high frequency PCB, the following information should be prepared:

  • Gerber files and NC drill files
  • PCB stackup with ZY material grade specified — ZYF220D, ZYF225DA, ZYF265D, ZYF300CA-P, or ZYF350CA
  • Dielectric thickness requirement
  • Layer count and total board thickness
  • Controlled impedance requirements — target value and tolerance
  • Operating frequency range
  • Via structure — through-hole, blind, buried
  • Surface finish requirement
  • Whether ZY is acceptable as alternative to a specified Rogers grade — or if Rogers is explicitly required
  • IPC Class requirement — Class 2 for most commercial ZY applications
  • Quantity — prototype or production lot
  • Application background — commercial, industrial, or other
  For a complete quotation file checklist, see What Files Are Needed for a High Frequency PCB Quotation?. For comparison with Rogers material properties, see Rogers PCB Material Selection Guide for RF and Microwave Applications.

  Conclusion

  ZY (中英板材) high frequency materials — ZYF220D, ZYF225DA, ZYF265D, ZYF300CA-P, and ZYF350CA — are PTFE-based laminates covering Dk from 2.20 to 3.50 that can serve as cost-effective alternatives to Rogers materials for commercial and industrial RF PCB applications. ZYF220D matches Rogers RT5880 in both Dk and Df. ZYF350CA has slightly lower Df than Rogers RO4350B. ZYF300CA-P has higher Df than Rogers RO3003 — a practical consideration for applications where insertion loss is critical.

  ZY materials are not substitutes for Rogers in aerospace, defense, or IPC Class 3 programs requiring Rogers-certified documentation. For commercial high frequency PCB projects at C-band to X-band where cost is a priority and Rogers-certified traceability is not required, ZY materials are worth evaluating as part of a full material selection review. Confirming Dk, Df, available thickness, and manufacturing compatibility with the PCB manufacturer before finalizing the design avoids substitution problems during production.