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 APPLICATIONS Engineers with a satisfactory solution when designing PCBs which may be subject to high levels of board flexure. High Flexure Stress Circuit Boards e.g. Depanelization: Components near edges of board. PRODUCT ADVANTAGES Variable Temperature Applications High mechanical performance able to withstand, 5mm bend test Soft termination offers improved reliability per- guaranteed. formance in applications where there is tem- Increased temperature cycling performance, 3000 cycles and beyond. perature variation. Flexible termination system. e.g. All kind of engine sensors: Direct connection to battery rail. Reduction in circuit board flex failures. Automotive Applications Base metal electrode system. Improved reliability. Automotive or commercial grade products available. Excellent mechanical performance and thermo mechanical performance. HOW TO ORDER 0805 5 C 104 K A Z 2 A Style Voltage Dielectric Capacitance Capacitance Failure Terminations Packaging Special Code Code (In pF) Tolerance Rate A = Std. Product 0603 6 = 6.3V C = X7R Z = FLEXITERM 2 = 7 reel 2 Sig Digits + J = 5%* A=Commercial 0805 Z = 10V F = X8R 4 = 13 reel For FLEXITERM Number of Zeros K = 10% 4 = Automotive 1206 Y = 16V with Tin/Lead e.g., 104 = 100nF M = 20% 1210 3 = 25V termination see 1812 5 = 50V AVX LD Series *1F only 2220 1 = 100V 2 = 200V 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 AEC-Q200 Qualification: Test Procedure as per AEC-Q200: Created by the Automotive Electronics Sample size: 20 components Council Span: 90mm Minimum deflection spec: 2 mm LOADING KNIFE Specification defining stress Components soldered onto FR4 PCB (Figure 1) test qualification for MOUNTING ASSEMBLY Board connected electrically to the test equipment passive components (Figure 2) DIGITAL Testing: CALIPER BEND TESTPLATE Key tests used to compare soft termination to CONNECTOR AEC-Q200 qualification: CONTROL PANEL Bend Test CONTROL PANEL Temperature Cycle Test Fig 2 - Board Bend test Fig 1 - PCB layout with electrical connections equipment BOARD BEND TEST RESULTS AEC-Q200 Vrs AVX FLEXITERM Bend Test 0603 0805 12 12 AVX ENHANCED SOFT 10 10 8 8 TERMINATION BEND TEST 6 6 4 4 PROCEDURE 2 2 0 0 NPO X7R X7R soft term NPO X7R X7R soft term Bend Test The capacitor is soldered to the printed circuit 1210 1206 board as shown and is bent up to 10mm at 12 12 10 10 1mm per second: 8 8 6 6 4 4 2 2 0 0 NPO X7R X7R soft term NPO X7R X7R soft term Max. = 10mm TABLE SUMMARY 90mm Typical bend test results are shown below: Style Conventional Termination FLEXITERM 0603 >2mm >5mm The board is placed on 2 supports 90mm 0805 >2mm >5mm apart (capacitor side down) 1206 >2mm >5mm The row of capacitors is aligned with the load stressing knife TEMPERATURE CYCLE TEST PROCEDURE Test Procedure as per AEC-Q200: Max. = 10mm The test is conducted to determine the resistance of the component when it is exposed to extr emes of alternating high and low temperatures. Sample lot size quantity 77 pieces TC chamber cycle from -55C to +125C for 1000 cycles Interim electrical measurements at 250, 500, 1000 cycles The load is applied and the deflection where Measure parameter capacitance dissipation factor, the part starts to crack is recorded (Note: insulation resistance Equipment detects the start of the crack using a highly sensitive current detection Test Temperature Profile (1 cycle) cir cuit) 0 +125 C The maximum deflection capability is 10mm 0 +25 C 0 -55 C 1 hour 12mins 47 Substrate Bend (mm) Substrate Bend (mm) Substrate Bend (mm) Substrate Bend (mm)