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4 Layer Hybrid PCB Made On 20mil RO4350B and FR-4 for GPS Transceiver
(Printed circuit boards are custom-made products, the picture and parameters shown are just for reference)
Hello everyone,
Continued with last article, today we’re going to talk about the 20mil RO4350B and FR-4 mixed.
Most of the situations are that the high frequency material plays the role of signal transmission. Let’s see the stack-up.
Layer 1 to layer 2 is the core of 20mil (0.508mm) RO4350B high frequency material, the signal transmission lines are on first layer copper, then layer 3 to layer 4 is another core of epoxy glass material. The 2 cores are bonded by a sheet of adhesive (prepreg).
Basic specifications
Base material: RO4350B 0.508 mm + FR4 0.6mm + PP 0.306mm
Layer count: 4 layers
Panel: 75mm x 82mm = 1 type = 1 piece
Surface finish: Immersion gold
Copper weight: Outer layer 70 um/ Inner layer 35 um
Solder mask / Legend: green / white
Final PCB height: 1.6 mm
Standard: IPC 6012 Class 2
Packing: 20 panels are packed for shipment.
Lead time: 10 working days
Shelf life: 6 months
Features and benefits
1) The temperature coefficient of dielectric constant is among the lowest of any circuit board material, making it ideal for temperature sensitive applications;
2) RO4350B exhibits a stable dielectric constant over a broad frequency range. This makes it an ideal substrate for broadband applications;
3) Signal integrity performance improvement over the stack-ups with all FR4 board;
4) ISO9001, ISO14001, IATF16949, UL Certified factory
5) Prototype to mass production capability;
Applications
Mixer, Radar data acquisition converter, Spread spectrum, Duplexer etc
Parameter and Data Sheet
| PCB SIZE | 125mm x 125mm = 1 type = 1 piece |
| BOARD TYPE | Multlayer PCB |
| Number of Layers | 4 Layers |
| Surface Mount Components | YES |
| Through Hole Components | YES |
| LAYER STACKUP | Copper -----Top Layer 0.070mm (2 oz) |
| RO4350B 0.508 mm | |
| Copper -----Plain 0.035 mm | |
| Prepreg 2113 X 3, 0.306mm | |
| Copper -----Plain 0.035 mm | |
| FR-4 0.6mm | |
| Copper ------- Bottom Layer 0.070mm (2oz) | |
| TECHNOLOGY | |
| Minimum Trace and Space: | 5.5 mil / 7.2 mil |
| Minimum / Maximum Holes: | 0.4 mm / 5.7 mm |
| Number of Different Holes: | 15 |
| Number of Drill Holes: | 172 |
| Number of Milled Slots: | 0 |
| Number of Internal Cutouts: | NA |
| Impedance Control: | N/A |
| Number of Gold finger: | N/A |
| BOARD MATERIAL | |
| Glass Epoxy: | RO4350B Tg280℃, er<3.48, Rogers Corp.; FR-4 IT158, ITEQ |
| Final foil external: | 2.0 oz |
| Final foil internal: | 1.0 oz |
| Final height of PCB: | 1.6 mm ±10% |
| PLATING AND COATING | |
| Surface Finish | Immersion Gold |
| Solder Mask Apply To: | Both Top and Bottom sides |
| Solder Mask Color: | Green |
| Solder Mask Type: | LPI, Taiyo PSR-2000GT600D |
| CONTOUR/CUTTING | Routing |
| MARKING | |
| Side of Component Legend | Top and bottom side |
| Colour of Component Legend | White, IJR-4000 MW300, Taiyo brand |
| Manufacturer Name or Logo: | Marked on the board in a conductor and leged FREE AREA |
| VIA | Plated through hole(PTH), minimum size 0.4mm. |
| FLAMIBILITY RATING | UL 94-V0 Approval MIN. |
| DIMENSION TOLERANCE | |
| Outline dimension: | 0.0059" |
| Board plating: | 0.0029" |
| Drill tolerance: | 0.002" |
| TEST | 100% Electrical Test prior shipment |
| TYPE OF ARTWORK TO BE SUPPLIED | email file, Gerber RS-274-X, PCBDOC etc |
| SERVICE AREA | Worldwide, Globally. |