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CER-10 High Frequency PCB

Introduction

Hello everyone. Welcome back to our RF PCB Channel. Today we’ll be discussing a type of high Dk RF PCB from Taconic company: CER-10 PCB.

CER-10 laminate incorporates a woven glass reinforcement, showcasing Taconic's expertise in ceramic fill technology and coated PTFE fiberglass.

It stands out with its outstanding interlaminar bond strength and solder resistance. Its proprietary composition ensures minimal moisture absorption and consistent electrical properties.

The woven glass reinforcement in CER-10 contributes to excellent dimensional stability and enhanced flexural strength. With a low Z-axis expansion (CTE 46 ppm/°C), this DK-10 laminate provides reliable plated-through-hole performance even in extreme thermal environments.

Now let’s delve into the detailed properties of each parameter.

Data sheet

CER-10 laminate offers an impressive array of properties, including excellent dielectric characteristics, low moisture absorption, remarkable mechanical strength, dimensional stability, and reliable thermal performance.

The dielectric constant of CER-10, measured using IPC-TM-650 2.5.5.6 standard, is 10, highlighting its good insulating properties. Additionally, the dissipation factor at 10 GHz is impressively low at 0.0035.

CER-10 boasts minimal moisture absorption, with a rate of only 0.02% according to IPC-TM-650 2.6.2.1. This feature ensures consistent electrical properties, making it a reliable choice for various applications.

The dielectric breakdown strength of CER-10 is 44 kV, as per IPC-TM-650 2.5.6 standard. Moreover, it exhibits a volume resistivity of 2.1 x 10^8 Mohm/cm and a surface resistivity of 1.1 x 10^9 Mohm, indicating its excellent electrical insulation characteristics.

The arc resistance is greater than 180 seconds.

CER-10 demonstrates remarkable flexural strength in both the machine direction (MD) and cross direction (CD). As per ASTM D 790, the flexural strength in MD is 16,500 psi (114 N/mm2), while in CD, it is 15,500 psi (107 N/mm2). Additionally, its tensile strength is 7,700 psi (53 N/mm2) in MD and 6,700 psi (46 N/mm2) in CD. These properties ensure the laminate's durability and reliability under mechanical stress

The peel strength of CER-10, evaluated using IPC-TM-650 2.4.8 standard with 1 oz. ED (electrodeposited) copper, is 9 lbs/linear inch (1.61 N/mm). It also exhibits excellent dimensional stability, with minimal changes observed in both the machine direction (MD) and cross direction (CD).

The density or specific gravity of the material is 3.05 g/cm3.

CER-10 showcases a thermal conductivity of 0.63 W/m/K according to ASTM F 433. Its coefficient of thermal expansion (CTE) in the x-y plane ranges from 13 to 15 ppm/℃, while in the z-axis, it is 46 ppm/℃. These values contribute to its reliability in extreme thermal environments.

CER-10 exhibits minimal outgassing characteristics, with a total mass loss (TML) of 0.02%, coefficient of volatile condensable material (CVCM) of 0.01%, and a water vapor regain (WVR) of 0.01%, as per ASTM E 595 standard.

CER-10 holds a UL 94 flammability rating of V-0, ensuring its resistance to ignition and reduced fire hazards.

CER-10 Typical Values
Property	Test Method	Unit	CER-10 Value
Dielectric Constant (Nominal)	IPC-TM-650 2.5.5.6		10
Dissipation Factor 10 GHz	IPC-TM-650 2.5.5.5.1		0.0035
Moisture Absorption	IPC-TM-650 2.6.2.1	%	0.02
Dielectric Breakdown	IPC-TM-650 2.5.6	kV	44
Volume Resistivity	IPC-TM-650 2.5.17.1	Mohm/cm	2.1 x 108
Surface Resistivity	IPC-TM-650 2.5.17.1	Mohm	1.1 x 109
Arc Resistance	IPC-TM-650 2.5.1	Seconds	>180
Flexural Strength (MD)	ASTM D 790	psi(N/mm2)	16500 (114)
Flexural Strength (CD)	ASTM D 790	psi(N/mm2)	15500 (107)
Tensile Strength (MD)	ASTM D 638	psi(N/mm2)	7700 (53)
Tensile Strength (CD)	ASTM D 3039	psi(N/mm2)	6700 (46)
Peel Strength (1 oz. ED)	IPC-TM-650 2.4.8	lbs/linear inch (N/mm)	9 (1.61)
Dimensional Stability (MD)	IPC-TM-650 2.4.39	in/in	-0.0002
Dimensional Stability (CD)	IPC-TM-650 2.4.39	in/in	-0.0003
Density (Specific Gravity)		g/cm3	3.05
Thermal Conductivity	ASTM F 433	W/m/K	0.63
CTE (x-y)	ASTM D 3386 (TMA)	ppm/℃	13-15
CTE (z)	ASTM D 3386 (TMA)	ppm/℃	46
Outgassing (%TML)	ASTM E 595	%	0.02
Outgassing (%CVCM)	ASTM E 595	%	0.01
Outgassing (%WVR)	ASTM E 595	%	0.01
Flammability Rating	UL 94		V-0

Our PCB Capability(CER-10)

Our PCB capability includes options for double-layer, multilayer, and hybrid PCBs, offering flexibility in design and functionality. Various layer counts can be accommodated to meet specific project requirements.

The copper weight options available are 1oz (35 μm) and 2oz (70 μm), allowing for different electrical conductivity needs and design considerations.

When it comes to dielectric thickness, choices include 25mil (0.635mm), 30mil (0.762mm), 47mil (1.194mm), and 50mil (1.27mm). These options permit customization based on the desired mechanical strength and space constraints of the application.

The maximum PCB size supported is 400mm X 500mm, providing ample room for various project sizes and requirements.

For solder mask options, a range of colors is available, including green, black, blue, yellow, red, and more. This allows for aesthetic customization or functional color-coding based on specific project needs.

The surface finish options encompass immersion gold, Hot Air Solder Leveling, immersion silver, immersion tin, pure gold, Electroless Nickel Electroless Palladium Immersion Gold, Organic Solderability Preservatives, bare copper, and more. These finishes cater to diverse requirements related to solderability, corrosion resistance, and compatibility with various assembly processes.

PCB Capability (CER-10)
PCB Material:	Organic-ceramic Laminate based on Woven Glass Reinforcement.
Designation:	CER-10
Dielectric constant:	10
Layer count:	Double Layer, Multilayer, Hybrid PCB
Copper weight:	0.5oz (17 µm), 1oz (35µm), 2oz (70µm)
Dielectric thickness:	25mil (0.635mm), 30mil(0.762mm), 47mil(1.194mm), 50mil (1.27mm)
PCB size:	≤400mm X 500mm
Solder mask:	Green, Black, Blue, Yellow, Red etc.
Surface finish:	Immersion gold, HASL, Immersion Silver, Immersion Tin, Pure gold, ENEPIG, OSP, Bare copper, etc..

CER-10 PCB and Typical Applications

On the screen, you can see a 30mil CER-10 PCB with immersion gold coating specifically designed for filters.

CER-10 is also widely used in applications such as power amplifiers, couplers, and passive components.

Final

The machining process for PTFE-based substrates is generally more challenging compared to epoxy-based substrates due to the softness of the PTFE resin system.

The type of fiberglass used in the substrate also impacts the routing quality in terms of burrs and fibers. The higher the density of the fiberglass weave, the more difficult it becomes to cut. However, CER-10 employs a fine fiberglass weave, resulting in smooth and efficient routing.

That concludes today's episode. Thank you for reading, and we'll see you next time.