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: RF PCB Built on RO4350B and RO4450B
with 4 Layers and Blind Via
(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 circuit board built on RO4350B with RO4450B
Prepreg for the application of radar sensor board. It's a multilayer layer RF PCB board at
1.0mm thick with immersion gold finish and solder mask and silkscreen. this board contains
Blind via from top layer to inner 1. since it's asymmetric buildup, 1.2% warpage is allowed.
It's fabricated per IPC 6012 Class 2 using supplied Gerber data. Each 10 boards are packed
for shipment. 


Features and benefits
Tg > 280
the dielectric constant (DK) is low and stable, so the signal transmission is good without
Delay.
Superior corrosion resistance. 
Immersion gold has excellent surface planarity, particularly helpful for PCBs with BGA
Packages or even CSP mounted components to reduce failure rate during assembly and
Soldering.
Engineering design prevents problems from occurring in pre-production. 
Thermal stress test, reliability test, insulation resistance test and ionic contamination test,
High quality helps customers win cost-saving.
1-10 pieces are offered.
UL conformed

Application
TV antenna, Transmitter combiner, Sound control switch induction, Tower Mounted
Amplifier

Parameter and data sheet

PCB SIZE	97 x 100 mm =1up
BOARD TYPE	HDI PCB, High frequency PCB
Number of Layers	4 layers
Surface Mount Components	YES
through Hole Components	YES
LAYER STACKUP	Copper ------- 35um(1 oz)+plate TOP layer
	RO4350B 6.6mil
	Inner Layer 1, 35um (1oz)
	Dielectric RO4450B 4mil x2
	Inner Layer 2, 35um (1oz)
	Dielectric RO4350B 20mil
	Copper ------- 35um(1oz) + plate  BOT Layer
TECHNOLOGY
Minimum Trace and Space:	5 mil / 4.9 mil
Minimum / Maximum Holes:	0.25 mm / 3.17 mm
Number of Different Holes:	3
Number of Drill Holes:	213
Number of Milled Slots:	0
Number of Internal Cutouts:	0
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:	1.0 mm 10%
PLATING and COATING
Surface Finish	Immersion gold, 85%
Solder Mask Apply to:	TOP, 12micron Minimum
Solder Mask Color:	Green, LP-4G/G-05, Nanya Supplied.
Solder Mask Type:	LPSM
CONTOUR/CUTTING	CNC Routing
MARKING
Side of Component Legend	TOP
Colour of Component Legend	White, S-380W, Nanya Supplied
Manufacturer Name or Logo:	Marked on the board in a conductor and leged FREE AREA
VIA	Plated through hole(PTH), minimum size 0.25mm. Blind Via L1-L2
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

Solder mask exposure