{"id":4339,"date":"2026-09-19T10:33:42","date_gmt":"2026-09-19T02:33:42","guid":{"rendered":"https:\/\/1717.webi.svipwebs.com\/?post_type=products&p=4339"},"modified":"2026-09-19T17:15:38","modified_gmt":"2026-09-19T09:15:38","slug":"ro4350bfr4-pcb","status":"publish","type":"products","link":"https:\/\/1717.webi.svipwebs.com\/pt\/products\/ro4350bfr4-pcb\/","title":{"rendered":"PCB Ro4350B+FR4"},"content":{"rendered":"

RO4350B + FR4 Hybrid Stack PCB: Features & Real\u2011World Cost Advantages for Your Designs<\/span><\/p>\n

Most RF hardware designers face a familiar trade\u2011off: you need reliable high\u2011frequency performance, yet full Rogers\u2011only boards push material costs way up. A RO4350B + FR4 hybrid stack PCB solves this pain point well. This mixed\u2011lamination construction combines Rogers RO4350B high\u2011frequency substrate and standard FR4 dielectric within one single stack\u2011up. The idea is simple: deploy the costly high\u2011frequency material only where your RF signal traces actually run.<\/p>\n

Rogers RO4350B delivers stable Dk values, low signal loss across microwave bands, and solid thermal stability. It performs consistently for 24\u202fGHz radar units, wireless communication modules, and antenna feed circuits. Meanwhile, the FR4 portions handle power rails, large ground planes, and all low\u2011speed digital routing. You no longer waste premium high\u2011frequency laminate on board regions that never demand low\u2011loss electrical properties.<\/p>\n

A well\u2011built RO4350B FR4 mixed laminate PCB preserves critical RF specifications. Fabricators use tightly controlled pressing cycles for RO4350B\u2011to\u2011FR4 bonding. Proper processing holds target impedance tolerances across the panel and prevents delamination during reflow soldering. Best of all, finished hybrid RO4350B FR4 boards work with standard SMT assembly workflows. Your contract assembler will not require special equipment or modified profiles for most production runs.<\/p>\n

So where do the real savings kick in? 100\u202f% Rogers RO4350B PCBs carry steep material overhead. When you confine RO4350B to RF\u2011critical signal layers and fill remaining layers with cost\u2011effective FR4 cores and prepregs, overall board pricing drops noticeably. Cost reduction becomes far more significant for large\u2011format multi\u2011layer designs, especially at medium\u2011to\u2011high production volumes.<\/p>\n

That said, hybrid RO4350B FR4 mixed\u2011stack PCBs are not plug\u2011and\u2011drop. Thermal expansion mismatch between RO4350B and FR4 exists. Your PCB designer must prioritize stack\u2011up symmetry to minimise board warpage. Copper weight distribution and via architectures also deserve careful review. Partnering with an experienced PCB manufacturer familiar with RO4350B FR4 hybrid lamination keeps yield risks low.<\/p>\n

This board type fits plenty of real\u2011life applications. RF sensor hardware, IoT wireless transceivers, small\u2011cell sub\u2011modules, and mixed\u2011signal high\u2011speed PCBs frequently select this stack\u2011up approach. It is not suitable for extreme high\u2011frequency applications where every single layer needs ultra\u2011low\u2011loss performance. Still, for most combined RF\u2011and\u2011digital circuits, it delivers acceptable electrical behaviour without the full Rogers price tag.<\/p>\n

If your project calls for RF\u2011grade performance but you want to bring down overall PCB spend, RO4350B FR4 hybrid lamination PCB deserves serious consideration. Discuss your stack\u2011up options, impedance targets, and manufacturing tolerances with your PCB supplier early in the design cycle. Thoughtful pre\u2011production stack planning locks in consistent board quality and maximises achievable cost savings.<\/p>\n

Rogers RO4350B Standard Material Specification Parameters<\/h2>\n
Below are the authoritative and commonly used technical parameters of RO4350B high-frequency PCB laminate, covering electrical, thermal, mechanical and safety properties to support high-frequency PCB design and manufacturing validation.<\/div>\n
\n\n\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\n
Parameter Category<\/div>\n<\/th>\n
\n
Technical Item<\/div>\n<\/th>\n
\n
Typical Value<\/div>\n<\/th>\n
\n
Test Condition & Standard<\/div>\n<\/th>\n<\/tr>\n<\/thead>\n
\n
Electrical Properties<\/div>\n<\/td>\n
\n
Dielectric Constant (Dk)<\/div>\n<\/td>\n
\n
3.48 \u00b1 0.05<\/div>\n<\/td>\n
\n
10GHz, IPC-TM-650<\/div>\n<\/td>\n<\/tr>\n
\n
Dissipation Factor (Df)<\/div>\n<\/td>\n
\n
0.0037<\/div>\n<\/td>\n
\n
10GHz, low signal loss performance<\/div>\n<\/td>\n<\/tr>\n
\n
Volume Resistivity<\/div>\n<\/td>\n
\n
1.7\u00d710\u00b9\u2070 M\u03a9\u00b7cm<\/div>\n<\/td>\n
\n
Condition A, room temperature<\/div>\n<\/td>\n<\/tr>\n
\n
Surface Resistivity<\/div>\n<\/td>\n
\n
4.2\u00d710\u2079 M\u03a9<\/div>\n<\/td>\n
\n
Standard atmospheric environment<\/div>\n<\/td>\n<\/tr>\n
\n
Dielectric Breakdown Strength<\/div>\n<\/td>\n
\n
500 V\/mil<\/div>\n<\/td>\n
\n
Insulation reliability test<\/div>\n<\/td>\n<\/tr>\n
\n
Arc Resistance<\/div>\n<\/td>\n
\n
125 sec<\/div>\n<\/td>\n
\n
Anti-arc performance verification<\/div>\n<\/td>\n<\/tr>\n
\n
Thermal Properties<\/div>\n<\/td>\n
\n
Glass Transition Temperature (Tg)<\/div>\n<\/td>\n
\n
\uff1e280\u00b0C<\/div>\n<\/td>\n
\n
TMA test, IPC-TM-650<\/div>\n<\/td>\n<\/tr>\n
\n
Thermal Decomposition Temperature (Td)<\/div>\n<\/td>\n
\n
390\u00b0C<\/div>\n<\/td>\n
\n
TGA thermal stability test<\/div>\n<\/td>\n<\/tr>\n
\n
Z-axis CTE<\/div>\n<\/td>\n
\n
32 ppm\/\u00b0C<\/div>\n<\/td>\n
\n
Low thermal expansion, improves PTH reliability<\/div>\n<\/td>\n<\/tr>\n
\n
Thermal Conductivity<\/div>\n<\/td>\n
\n
0.69 W\/m\u00b7K<\/div>\n<\/td>\n
\n
80\u00b0C working condition<\/div>\n<\/td>\n<\/tr>\n
\n
Mechanical Properties<\/div>\n<\/td>\n
\n
Flexural Strength<\/div>\n<\/td>\n
\n
255 MPa<\/div>\n<\/td>\n
\n
IPC-TM-650 standard<\/div>\n<\/td>\n<\/tr>\n
\n
Tensile Strength (Y-direction)<\/div>\n<\/td>\n
\n
175 MPa<\/div>\n<\/td>\n
\n
ASTM D638, room temperature<\/div>\n<\/td>\n<\/tr>\n
\n
Moisture Absorption<\/div>\n<\/td>\n
\n
0.06%<\/div>\n<\/td>\n
\n
50\u00b0C, 48h immersion test<\/div>\n<\/td>\n<\/tr>\n
\n
Safety Grade<\/div>\n<\/td>\n
\n
Flame Retardant Rating<\/div>\n<\/td>\n
\n
UL 94 V-0<\/div>\n<\/td>\n
\n
Industry standard fire resistance<\/div>\n<\/td>\n<\/tr>\n
\n
Application Range<\/div>\n<\/td>\n
\n
Working Frequency<\/div>\n<\/td>\n
\n
500MHz \u2013 77GHz<\/div>\n<\/td>\n
\n
Suitable for full-band RF high-frequency circuits<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
These stable parameter indicators make custom RO4350B high-frequency PCB ideal for high-precision RF circuits, 5G base station modules and microwave communication equipment. It maintains consistent electrical and mechanical performance even in long-term high-frequency and high-temperature working environments.<\/div>","protected":false},"excerpt":{"rendered":"

RO4350B + FR4 Hybrid Stack PCB: Features & Real\u2011World Cost Advantages for Your Designs Most RF hardware designers face a familiar trade\u2011off: you need reliable high\u2011frequency performance, yet full Rogers\u2011only boards push material costs way up. A RO4350B + FR4 hybrid stack PCB solves this pain point well. This mixed\u2011lamination construction combines Rogers RO4350B high\u2011frequency […]<\/p>\n","protected":false},"featured_media":4340,"parent":0,"menu_order":0,"template":"","tags":[545],"product":[490],"class_list":["post-4339","products","type-products","status-publish","has-post-thumbnail","hentry","tag-ro4350bfr4-pcb","product-high-frequency-pcb"],"acf":[],"_links":{"self":[{"href":"https:\/\/1717.webi.svipwebs.com\/pt\/wp-json\/wp\/v2\/products\/4339","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/1717.webi.svipwebs.com\/pt\/wp-json\/wp\/v2\/products"}],"about":[{"href":"https:\/\/1717.webi.svipwebs.com\/pt\/wp-json\/wp\/v2\/types\/products"}],"version-history":[{"count":5,"href":"https:\/\/1717.webi.svipwebs.com\/pt\/wp-json\/wp\/v2\/products\/4339\/revisions"}],"predecessor-version":[{"id":4375,"href":"https:\/\/1717.webi.svipwebs.com\/pt\/wp-json\/wp\/v2\/products\/4339\/revisions\/4375"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/1717.webi.svipwebs.com\/pt\/wp-json\/wp\/v2\/media\/4340"}],"wp:attachment":[{"href":"https:\/\/1717.webi.svipwebs.com\/pt\/wp-json\/wp\/v2\/media?parent=4339"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/1717.webi.svipwebs.com\/pt\/wp-json\/wp\/v2\/tags?post=4339"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/1717.webi.svipwebs.com\/pt\/wp-json\/wp\/v2\/product?post=4339"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}