Park Aerospace Nelco® N4000-29 BC® Buried Capacitance™ Multifunctional Epoxy

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Park Aerospace Nelco® N4000-29 BC® Buried Capacitance™ Multifunctional Epoxy
Categories:	Polymer; Thermoset; Epoxy
Material Notes:	The Nelco N4000-29 is a lead-free, low-CTE, high Tg multifunctional epoxy substrate which has been designed for use in standard multilayer PWB designs and today’s toughest, high-performance, lead-free applications. The Nelco N4000-29 BC® is offered as a buried capacitance solution, offering a greater degree of design freedom for smaller, more reliable assemblies. Key Features and Benefits: Low Z-axis expansion High Tg, excellent thermal stability and moisture resistance CAF Resistant Proprietary resin chemistry Buried Capacitance Solution Optimized FR-4 processing Applications/Qualifications: High Density Interconnects Advanced Lead-Free Assembly Substrate Large Format Backplanes Tight Tolerance Via to Via Applications High I / O Count BGA Substrates Extreme Layer Count Multilayers Lead-Free DCA Applications High Temperature Underhood Automotive Telecommunications Infrastructure Sophisticated Data Storage Applications RoHS Compliant Meets IPC-4101/28, /98, /99 and /126 Specifications Information provided by Park Electrochemical Corp.
Key Words:	EP
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Physical Properties	Original Value	Comments

Density	1.99 g/cc	50% Resin Content; Internal Method
Water Absorption	0.15 %	IPC-TM-650.2.6.2.1

Mechanical Properties	Original Value	Comments
Peel Strength	8.90 pli	at elevated temperature; IPC-TM-650.2.4.8.2a
	9.70 pli	after exposure to process solutions; IPC-TM-650.2.4.8
	10.1 pli	after solder float; IPC-TM-650.2.4.8

Electrical Properties	Original Value	Comments
Dielectric Constant	3.7 @Frequency 1e+10 Hz	Split Post Cavity
	3.9 @Frequency 1e+9 Hz	RF Impedance; IPC-TM-650.2.5.5.9
	4.1 @Frequency 1e+6 Hz	TFC/LCR Meter; IPC-TM-650.2.5.5.3
Dielectric Strength	1100 V/mil	IPC-TM-650.2.5.6.2
Dissipation Factor	0.016 @Frequency 2.50e+10 Hz	Split Post Cavity; IPC-TM-650.2.5.5.9
	0.022 @Frequency 1e+6 Hz	TFC/LCR Meter; IPC-TM-650.2.5.5.3

Thermal Properties	Original Value	Comments
Specific Heat Capacity	0.220 BTU/lb-°F	ASTM E1461-92
Thermal Conductivity	3.19 BTU-in/hr-ft²-°F	ASTM E1461-92
Glass Transition Temp, Tg	>= 175 °C	TMA; IPC-TM-650.2.4.24c
	>= 185 °C	DSC; IPC-TM-650.2.4.25c
Decomposition Temperature	350 °C	5% weight loss; TGA; IPC-TM-650.2.4.24.6
Flammability, UL94	V-0

Descriptive Properties
Methylene Chloride Resistance (% Weight Change)	0.01	IPC-TM-650.2.3.4.3
T260 (minutes)	>60	IPC-TM-650.2.4.24.1
T288 (minutes)	15	IPC-TM-650.2.4.24.1

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PPARK118 / 89390

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