F-7761DE_C (2011-06)

New Qualification Norm for LEDs Uwe Berger

Ludger Kappius

Lippstadt, 2012-04-03

New Norm for LED Qualification

LED market development

Automotive Requirements

Test Approach of IEC60810

Sample Sizes

Requalification

2

3

LED – IntroductionMarket Forecast

source: strategies unlimited

LED Market Forecast

4

CHMSL1992

Full-LED-headlamp 2007/2008

First signal functions in headlamps 2003

Full-LED rear light

2006

Stop / Tail

function

2000

LED – IntroductionDevelopment in LED Technology at Hella

5

LED – IntroductionAutomotive Study of European LED Headlamp Market

66

39

34

35

26

LED Headlamp Market (Europe)

Values in percent

Strong growth of full- LED headlamps in the next years and in Europe a very high share on a value basis of ¼ for the total headlamp market in 2015.

Strong growth of full- LED headlamps in the next years and in Europe a very high share on a value basis of ¼ for the total headlamp market in 2015.

2007 2015Halogen HID LED

Quelle: Frost & Sullivan

Strong growth of full- LED headlamps in the next years and in Europe a very high share on a value basis of ¼ for the total headlamp market in 2015.

Strong growth of full- LED headlamps in the next years and in Europe a very high share on a value basis of ¼ for the total headlamp market in 2015.

6

LED – IntroductionWhy using LEDs? - Light Quality

Halogen

Xenon

LED

yellowish

bluish

similar to daylight

High potential for differentiation: Light-Colour*High potential for differentiation: Light-Colour*

Daylight

7

LED – IntroductionWhy using LEDs? - Lifetime

Incandescant

P21 W

Halogen-

H21 W

Halogen

H7

Xenon

D2 S

LED

Efficacy

lm/W 18 25 25 90 70 – 200

Life time

h 400 (Tc) 440 (Tc) 550 (Tc) 2000 (B50)10000 -50000

(B50)

Tc: 63 % failures, B50: 50 % failures

IEC 60810 - Draft Proposal to insert requirements and test conditions for LED Packages

8

IEC

- TC34

- SC34A

- PRESCO (WORKING GROUP)

IEC

- TC34

- SC34A

- PRESCO (WORKING GROUP)

Involved LED Suppliers

- Philips

- OSRAM

- GE

Involved LED Suppliers

- Philips

- OSRAM

- GE

Consulted LED Customers

- Hella

- Automotive Lighting

- Valeo

- ZkW

Consulted LED Customers

- Hella

- Automotive Lighting

- Valeo

- ZkW

9

LED – Basic Structure of LEDsDesign of SMD LEDs – Example :

Source: OSRAM

Classification of Automotive Requirements for LEDs

Mechanical Environment

-Vibration

-Shock

Electrical Environment

-ESD

Thermal Environment

-High Temperature

-Temperature Cycles

-Solder Heat

10

AECQ 101

Classification of Automotive Requirements for LEDs

Chemical Environment

- Humidity

- Gases

Pre and Post Stress Tests

- Electrical Tests

- Photometrical Tests

- Destructive Tests

11

AECQ101

LED Specific

IEC60810 InsertTest Strategy

12

Environmental Stress

Chemical Stress

ElectricalTest

PhotometricTest

ElectricalTest

≅ AECQ101

LED Specific

Visual Control

PhotometricTest

Detailed Test description

13

TEST IEC 60810

Test Name RelatedNorm

Relates toAECQ101

8.2.5 Moisture Preconditioning JESD22-A113 2 (PC)

8.2.6 Thermal Resistance JESD51 22 (referencesJESD24)

8.6.1 Pre-an Post Electrical andPhotometric Test

1 (TEST)

8.6.2 Pre and Post External Visual JESD22-B101 3 (EV)

8.6.1, Electrical: - Forward Voltage- Test at nominal If , additionally @ min If and max If- Simple light on/off test at different temperatures

8.6.1, Photometric: - Luminous flux or radiant power or intensity- Colour Coordinates or Wave length

Detailed Test description

14

TEST IEC 60810

Test Name RelatedNorm

Relates toAECQ101

8.6.3 High Temperature OperatingLife Test

JESD22-A108

5,6 (no Reverse Bias or Gate Bias)

8.6.4 Temperature Cycling Test JESD22-A104

7 (TC, different grades applied)

8.6.5 Wet High TemperatureOperating Life

JESD22-A101

9 (No Reverse Bias)

8.6.6 Power Temperature Cycling JESD22-A105

10alt (PTC)

If

T 8.6.3: Test at Tmax and Ifmax

8.6.5: Test at max Ifand min If (Silver Migration)

If

V

Detailed Test description

15

TEST IEC 60810

Test Name RelatedNorm

Relates toAECQ101

8.6.7 Electrostatic Discharge, Human Body Model

JS-001-2010

11 ( referencesJESD22-A114)

8.6.8 Electrostatic Discharge, Machine Model

JESD22-A115

11 (ESD)

8.6.9 Destructive Physical Analysis 12 (PDA)

8.6.10 Physical Dimensions Test 13 (PD)

CDM is not done due to problems in the test setup

Detailed Test description

16

TEST IEC 60810

Test Name RelatedNorm

Relates toAECQ101

8.6.11 Vibrations Variable Frequency

JESD22-B103

17 (VVF)

8.6.12 Mechanical Shock JESD22-B104

18 (MS)

8.6.13 Resistance to Soldering Heat(Wave Soldering)

JESD22-B106

20 (RSH)

8.6.14 Resistance to Soldering Heat(Reflow)

JESD22-A113

2 (PC)

8.6.15 Solderability Test IEC60068-2-20 orJ-STD-002

21 (SD )

8.6.16 Thermal Shock, liquid-liquid

JESD22-A106

Not in AECQ 101

Detailed Test description

17

TEST IEC 60810

Test Name Related Norm Relates toAECQ101

8.6.17 Hydrogen Sulphide (H2S) Test IEC60068-2-43 Not in AECQ 101

8.6.18 Pulsed Operating Life Test JESD22-A108

8.6.19 Dew (DEW) Test JESD22-A100 Not in AECQ 101

8.6.20 Flowing Mixed Gas Corrosion(FMGC) Test

IEC60068-2-60 Not in AECQ 101

8.2.17 40°C, 90%RH, 10-15 ppm H2S , 336 hrs

8.6.20 25°C, 75% RH, H2S, NO2, Cl2, SO2, 500hrs , Test Mode 4

Not Applicable Tests

18

TEST IEC 60810

Test Name RelatedNorm

Relates toAECQ101

Autoclave 8 (AC)

Terminal Strength 14 (TS)

Constant Acceleration 16 (CA)

Resistance to Solvents 15 (RTS)

Hermeticity 19 (HER)

Unclamped InductiveSwitching

26 (UIS)

Dielectric Integrity 27 (DI)

Tests not taken into account

19

TEST IEC 60810

Test Name RelatedNorm

Relates toAECQ101

Wire Bond Strength 23 (WBS)

Bond Shear 24 (BS)

Die Shear 25 (DS)

- Due to the difficulty in opening LED Packages ,it is not allways possible to do these test after, e.g Temperature Cycles.

- However, it should be considered then to do these tests on unmoldeddevices

Miscellaneous

20

Sample Size is Standard: 3x 26

Exemption: Solderability (6.6.15) : 1 x11

In contrast AECQ101 uses mostly 1 x 77

Requalification is handled by a Requalification Matrix

Depending on the change, certain tests are considered- Recommended- Recommended based on LED type- Not appliccable

Robustness validation will be considered in a further update

Open Questions

21

Two standards, in 60810 and AECQ101,are not desirable for both producers and customers

Two Standards is No Standard

- What is the general relation between IEC and AEC ?

- What is the standpoint of the AECQ101 towards LEDs?

- Is there a way to unify both approaches ?

Contacts: uwe.berger@hella.comludger.kappius@hella.com