MLCC with FLEXITERM
®
General Specifications
GENERAL DESCRIPTION
With increased requirements from the automotive industry for additional
component robustness, AVX recognized the need to produce a MLCC with
enhanced mechanical strength. It was noted that many components may be
subject to severe flexing and vibration when used in various under the hood
automotive and other harsh environment applications.
To satisfy the requirement for enhanced mechanical strength, AVX had to
find a way of ensuring electrical integrity is maintained whilst external forces
are being applied to the component. It was found that the structure of the
termination needed to be flexible and after much research and development,
AVX launched FLEXITERM
®
. FLEXITERM
®
is designed to enhance the
mechanical flexure and temperature cycling performance of a standard
ceramic capacitor with an X7R dielectric.
The industry standard for
flexure is 2mm minimum. Using FLEXITERM
®
, AVX provides up to
5mm of flexure without internal cracks. Beyond 5mm, the capacitor
will generally fail “open”.
As well as for automotive applications FLEXITERM
®
will provide Design
Engineers with a satisfactory solution when designing PCB’s which may be
subject to high levels of board flexure.
APPLICATIONS
High Flexure Stress Circuit Boards
• e.g. Depanelization: Components near edges
of board.
Variable Temperature Applications
• Soft termination offers improved reliability per-
formance in applications where there is tem-
perature variation.
• e.g. All kind of engine sensors: Direct
connection to battery rail.
Automotive Applications
• Improved reliability.
• Excellent mechanical performance and
thermo mechanical performance.
PRODUCT ADVANTAGES
• High mechanical performance able to withstand, 5mm bend test
guaranteed.
•
Increased temperature cycling performance, 3000 cycles and beyond.
•
Flexible termination system.
•
Reduction in circuit board flex failures.
•
Base metal electrode system.
•
Automotive or commercial grade products available.
HOW TO ORDER
0805
Style
0603
0805
1206
1210
1812
2220
5
Voltage
6 = 6.3V
Z = 10V
Y = 16V
3 = 25V
5 = 50V
1 = 100V
2 = 200V
C
Dielectric
C = X7R
F = X8R
104
Capacitance
Code (In pF)
2 Sig Digits +
Number of Zeros
e.g., 104 = 100nF
K
Capacitance
Tolerance
J = ±5%*
K = ±10%
M = ±20%
*≤1μF only
A
Z
2
Packaging
2 = 7" reel
4 = 13" reel
A
Special Code
A = Std. Product
Failure
Terminations
Rate
Z = FLEXITERM
®
A=Commercial For FLEXITERM
®
4 = Automotive with Tin/Lead
termination see
AVX LD Series
NOTE: Contact factory for availability of Tolerance Options for Specific Part Numbers.
46
MLCC with FLEXITERM
®
Specifications and Test Methods
PERFORMANCE TESTING
BOARD BEND TEST PROCEDURE
According to AEC-Q200
LOADING
KNIFE
MOUNTING
ASSEMBLY
DIGITAL
CALIPER
BEND TESTPLATE
CONNECTOR
CONTROL
PANEL
CONTROL PANEL
BOARD BEND TEST RESULTS
AEC-Q200 Vrs AVX FLEXITERM
®
Bend Test
Substrate Bend (mm)
Substrate Bend (mm)
12
10
8
6
4
2
0
NPO
0603
0805
12
10
8
6
4
2
0
NPO
X7R
1210
X7R soft term
AVX ENHANCED SOFT
TERMINATION BEND TEST
PROCEDURE
Bend Test
The capacitor is soldered to the printed circuit
board as shown and is bent up to 10mm at
1mm per second:
X7R
X7R soft term
Substrate Bend (mm)
X7R soft term
Substrate Bend (mm)
12
10
8
6
4
2
0
NPO
1206
12
10
8
6
4
2
0
NPO
X7R
X7R soft term
X7R
Typical bend test 9-.91ults boar
TEMPERATURE CYCLE TEST PROCEDURE
+125
0
C
+25
0
C
-55
0
C
1 hour 12mins
47
cartn(e capacitoside dshomm)
MLCC with FLEXITERM
®
Specifications and Test Methods
BEYOND 1000 CYCLES: TEMPERATURE CYCLE TEST RESULTS
10
8
% Failure
6
4
2
0
0
500 1000 1500 2000 2500 3000
1206
% Failure
0603
10
8
6
4
2
0
0
500 1000 1500 2000 2500 3000
1210
0805
10
8
% Failure
6
4
2
0
0
10
8
% Failure
6
4
2
0
0
500 1000 1500 2000 2500 3000
500 1000 1500 2000 2500 3000
AEC-Q200 specification states
1000 cycles compared to AVX
3000 temperature cycles.
Soft Term - No Defects up to 3000 cycles
FLEXITERM® TEST SUMMARY
• Qualified to AEC-Q200 test/specification with the exception
of using AVX 3000 temperature cycles (up to +150°C bend
test guaranteed greater than 5mm).
• FLEXITERM
®
provides improved performance compared to
standard termination systems.
• Board bend test improvement by a factor of 2 to 4 times.
• Temperature Cycling:
– 0% Failure up to 3000 cycles
– No ESR change up to 3000 cycles
WITHOUT SOFT TERMINATION
WITH SOFT TERMINATION
Major fear is of latent board flex failures.
Far superior mechanical performance.
Generally open failure mode beyond
5mm flexure.
48
模拟与混合信号
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