Datasheet

COBRITHERM®
DESCRIPTION
Insulated Metal Substrate (IMS), based on thick aluminium and clad with ED copper foil in the other side. It is
designed for a reliable thermal dissipation circuitry. With a proprietary formulated reinforced-polymer-ceramic
bonding layer with a high thermal conductivity, dielectric strength, and thermal endurance is guaranteed.
The material is supplied with a protective film on the aluminium side to protect it against wet PCB process
ROHS compliance directive 2002/95/EC
STANDARD CONSTRUCTIONS
Aluminium thickness
1000 - 1500 - 2000 - 3000 μm
Aluminium Alloy / Treat 5052 H18
Insulation thickness
110 - 130 μm
Dielectric thickness tolerance + 10 μm
ED copper thickness
35 - 70 - 105 - 210 μm
Other constructions available upon request
PROPERTIES
TEST
1500 μm Al / 130 μm dielectric /70 μm Cu
METHOD
UNITS
TYPICAL
VALUES
Guaranteed
values
Time to blister at 288ºC, floating on solder (50 x 50 mm) IEC-61189 Sec >120 >120
Copper Peel strength, after heat shock 20 sec/288ºC IPC-TM 650-2.4.8 N/mm 2,8 >1,8
Dielectric breakdown voltage, AC (1) IPC-TM 650-2.5.6.3 kV 8 7
Proof Test, DC (2) -- V 3000 3000
Thermal conductivity (dielectric layer) ASTM-D 5470 w/m.ºK 1,45 1,45
Thermal impedance (dielectric layer) x 10
-3
ASTM-D 5470 ºK.m
2
/w 0,089 0,089
Surface resistance after damp heat and recovery
IEC-61189
MΩ 10
5
10
5
Volume resistivity after damp heat and recovery
IEC-61189
MΩm 10
4
10
4
Relative permitivity after damp heat and recovery, 10 kHz
IEC-61189
- 4,5 4,5
Dissipation factor after damp heat and recovery 10 kHz
IEC-61189
- 0,02 0,02
Comparative tracking index (CTI) IEC-61112 V 600 600
Capacitance -- pF/cm² 46 46
Flammability, according UL-94, class UL-94 class V-0 V-0
Glass transition temperature of dielectric layer ( by TMA) IPC-TM 650-2.4.24 ºC 90 90
Maximum operating temperature -- ° C 150 150
DATA SHEET DS_1107
COBRITHERM HTC
AI
S
MALIBAR
(1) Dielectric Breakdown test, is a material destructive laboratory test. It is performed according the IPC-TM-650 part 2.5.6.3., under
AC voltage, raising it until electric failure, on relative small surface area of the dielectric part, and using metal electrodes. Values
should be taken as a material reference, and not as guaranteed values.
(2) Electrical proof test. 100% of our laminate production delivered, has been “on line” verified at 3000 V
dc
: 500 V/sec. ramp // 5sec.
held at 2000 V
dc
.
AVAILABILITY
STANDARD SHEET SIZES mm. 610 x 440, 920 x 610, 1060 x 585
Tolerance +5/-0 mm.
Squareness 3 mm max., as differential between diagonal measurements.
Standard size tolerance in panels +- 0,3 mm.
The data is based on typical values of standard production and should be considered as general information. Our company reserves the right to future
changes. It is the responsibility of the user to ensure that the product complies with his requirements.
AISMALIBAR, S.A.
Ctra. de Ripollet, 1, 08110 Montcada i Reixac (BCN) SPAIN
Tel. [phone] Fax. [phone]