Brief Introduction
Just as its name implies, high frequency is that the frequency is relatively high, generally refers
to the frequency of >=300 MHz (i.e. Wave length <=1m), that is, the usual radio frequency
Band. the electromagnetic wave of frequency >=1GHz is named microwave.
Typical frequencies for wireless applications:
* Current: 0.9GHz - 2GHz
* 3G systems: 2.5GHz
* Bluetooth: 2.5GHz
* GPS: 12.6GHz
* LMDS: 24GHz and 40GHz
* Automotive: 77GHz
Market: RFID, Wireless communications, base station and antenna, amplifier, military products,
Consumer electronics.  
High frequency printed circuit board or microwave PCB refers to the printed circuit board made
on the high frequency (microwave) substrate copper clad plate. the common types are: Double
-sided board, multilayer board and mixed structure.
Mixed structure includes high performance special substrate, PP sheet + ordinary performance
Board and PP sheet mixed pressing board; high frequency substrate + ordinary FR4 substrate;
High frequency substrate + metal base etc.


PCB Case: High Frequency PCB on 8 mil RO4350B and
10 mil RO4450B with Immersion Gold for Radar RF
(Printed circuit boards are custom-made products, the picture and parameters shown are
Just for reference)


General description
this is a type of 4 layer high frequency PCB built on RO4350B substrate with Tg 280C for the
Application of RF radar. the RF board has a thickness of 0.82mm with a minimum 4mil track
and 5mil gap. this is a pure high frequency multilayer PCB with RO4450B as dielectric prepreg.
Other specifications are white silkscreen over green solder mask, immersion gold plated on pads.
Entire board is suppled 1 up per panel with 10mm strips on each long side. They're fabricated
Per IPC 6012 Class 2 using supplied Gerber data. Each 50 panels are packed for shipment. 


Features and benefits
Excellent high frequency performance due to low dielectric tolerance and loss;
Good high temperature and low temperature resistance(-192-260);
Low thermal coefficient of dielectric constant;
High solderability, no stressing of circuit boards and less contamination of PCB surface;
RoHS materials;
Eligible products rate of first production: >95%  
Small quantity order is accepted;
Delivery on time: >98%  
Customer complaint rate: <1% 


Application
Modular oscilloscope,Variocoupler,Tower-mounted booster,Power amplifier 



Parameter and data sheet

PCB SIZE	85 x 100mm=1PCS
BOARD TYPE	Multilayer PCB
Number of Layers	4 Layers
Surface Mount Components	YES
through Hole Components	No
LAYER STACKUP	Copper ------- 35um(1 oz)+plate TOP layer
	Dielectric RO4350B 0.168mm (6.6 mil)
	Copper ------- 35um(1oz)
	Dielectric RO4350B 0.203mm (8 mil)
	Copper ------ 35um (1oz)
	Dielectric RO4450B 0.254mm ( 10 mil)
	Copper ------35um (1oz) + plate Bottom Layer
TECHNOLOGY
Minimum Trace and Space:	4 mil / 5 mil
Minimum / Maximum Holes:	0.25 mm / 2.0 mm
Number of Different Holes:	5
Number of Drill Holes:	175
Number of Milled Slots:	0
Number of Internal Cutouts:	3
Impedance Control:	no
Number of Gold finger:	0
BOARD MATERIAL
Glass Epoxy:	RO4350B Tg280, er<3.48, Rogers Corp.
Final foil external:	1.5 oz
Final foil internal:	1 oz
Final height of PCB:	0.82 mm 0.1mm
PLATING and COATING
Surface Finish	Immersion gold
Solder Mask Apply to:	TOP, 12micron Minimum
Solder Mask Color:	Green, LP-4G/G-05, Nanya Supplied.
Solder Mask Type:	LPSM
CONTOUR/CUTTING	Routing
MARKING
Side of Component Legend	TOP
Colour of Component Legend	White, S-380W, Taiyo brand
Manufacturer Name or Logo:	Marked on the board in a conductor and leged FREE AREA
VIA	Plated through hole(PTH), minimum size 0.25mm.
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	Gerber RS-274-X, PCBDOC etc
SERVICE AREA	Worldwide, Globally.

Variety of PCBs

Ionic contamination tester