1、 KSKSKSKS SKSKSKS KSKSKS SKSKS KSKS SKS KS 2006 6 2 http:/www.kats.go.kr KS A 5608 3 3： KS A 5608 3： 2006 (2012 )A 5608 3： 2006 : ( ) ( ) ( ) : (http:/www.standard.go.kr) ： ：2006 6 2 ：2012 12 29 2012-837 ： ： ( 02-509-7294) (http:/www.kats.go.kr). 10 5 , . ICS 19.080 KS 3： A 5608 3： 2006(2012 ) Accel
2、erated life test Part 3： Data analysis of accelerated life test (accelerated test) . (life cycle) , . . . . , , . , B10 . 1. . 1： , 2： . 2. . . KS A 3004 KS A IEC 61710 3. . 3.1 (item) , , , , , , , . . 3.2 (performance) , , . 3.3 (failure) . . A 5608 3： 2006 2 3.4 (life) , , , on-off . 3.5 (acceler
3、ated life test) , . 3.6 AF (acceleration factor) (Td) (Ta) , AF Td/Ta3.7 (stress) , 3.8 (accelerating stress) 3.9 , Td AFTa 3.10 (failure mechanism) , , , , (random failure mechanism) (wearout failure mechanism) . 3.11 3.12 . 3.13 (accelerated life test model) 3.14 (life-stress relationship) 3.15 (d
4、egradation) (performance) 3.16 (mean time to failure) . 3.17 B100p p . 3.18 (median life) 50 % 50 % . , B50 . 3.19 (unreliability function) t t . t (cumulative distribution function) . 3.20 (reliability function) t t 4. ( , , ) , (extrapolation) . 1 . . Td , Ta , Td AFTa . , AF . A 5608 3： 2006 3 1
5、5. , Td Ta . , . 5.1 , (overstress) , (bathtub) . . 5.1.1 . 0,0),exp()( = tttf , (parameter) . ( 1/) . 0,0),exp(1)(= tttf , (characteristic life) . 2 0.01, 0.05 0.1 , . 2 0.1 0.05 0.010.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 0 100 200 300 A 5608 3： 2006 4 5.1.2 , , , , 100pth B10 . 1 F(t)
6、1 exp( t) R(t) exp( t) h(t) E(T) 1/ Var(T) (1/)2100pth t100p (1/ ) ln(1 p) B10 100pth p 0.1 .5.2 Weibull(1937) , . 5.2.1 (shape) , (scale) . 0,0,)(exp)()(1=ttttf 3 , . 1： 1： 2： (Rayleigh) 3.5： ( ) . , 100 200 , 200 1/2 . . 1. . 2. 5 1 h(t) , 1 h(t) , 1 h(t) . , , . A 5608 3： 2006 5 3 ( 0.5, 1.0, 1.5
7、, 2.0, 100) 4 ( 100, 200, 300, 400, 2) 5 ( 1) 5.2.2 , , , , B10 . 2 )(exp1)(ttF = )(exp)(ttR = 1)()(= tth )()11()(+=TE )11()21()(22 += TV 100pth /1P100)1ln( pt = B10 100pth p 0.1 , () . 2 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 0 1.5 1.0 0.5 0.0080.0070.0060.0050.0040.0030.0
8、020.0010 100 200 300 400100 200 300 400 500 600 100 200 300 400 500 600 10 h(t) 5 0 4.0 2.0 1.0 0.250 1 2 3 0 0A 5608 3： 2006 6 5.3 , (metal fatigue life), . 5.3.1 . T , T log(T) , . . 0,0,)log(1)(= ttttf ( ) , (location parameter), (scale parameter) . , . a) b) 6 5.3.2 , , , , 100pth 3 . 100pth , p
9、 0.5 z0.50 0.0 t0.50 exp() . , (median life) exp() , log(t0.50) . h(t) 0 , 0 . 8E-05 7E-05 6E-05 5E-05 4E-05 3E-05 2E-05 1E-05 0 0.000 160.000 140.000 120.000 18E-056E-054E-052E-050 0.5 25 000 50 000 75 000 100 000 0.8 25 000 50 000 75 000 100 000 0.2 0.5 1.0 A 5608 3： 2006 7 3 )log()(=ttF )log(1)(=
10、ttR )log(1)log()(=ttth )2/exp()(2+=TE 1)exp()()(22= TETVar 100pth exppP100 zt = B10 100pth p 0.1 . ( ) , zp (zp) 1 p 100(1 p)th . 6. (Td) (Ta) Fd(t) Fa(t) . Td AFTa , Fd(t) Fa(t) . Fd(t) P(Tdt) P(Tat/AF) Fa(t/AF) (1) 6.1 (Td) (Ta) d a . , Fd(t) 1 exp(t/d), Fa(t/AF) 1 expt/(AF a) , (1) d AFa . MLCC ,
11、 150 V 60( ) . 120 V 1.3 d 1.3a 1.360 78( ) . 6.2 (Td) d d , (Ta) a a . , Fd(t) 1 exp(t/d)d, Fa(t/AF) 1 exp(t/(AF a)a . (1) (t/d)d t/(AF a)a , d a ( ), d AFa . . d a , . . DC Motor , 2.5, a 107( ) . 4.0 , 200 . 2.5, d 4.0a 4.0107 428 , 200 Rd(200) exp (200/ 428)2.5 0.861 3 . 6.3 (Td) d d , (Ta) a a
12、. , A 5608 3： 2006 8 )/log()/(,)log()(aaaddd=AFtAFtFttF . (1) aadd)/log()log( = AFtt , d a ( ) , d a log(AF) . 1. . d a , . . 2. d a log(AF) exp(d) AFexp(a) . , exp() , . . a) ： d AFa(d , a ) b) ： d AFa , (d a , ) c) ： exp(d) AFexp(a) , (d a , ) 7. , . . 7.1 (Arrhenius relationship) , . (T) , . (T)
13、A expEa/(kT) Ea (activation energy)(： eV), k (8.617 110 5eV/ ), T ( 273.16), A . Ea , . . (T) ( ), (), (e) . 1： 1 , B10 B5 . log(T) 1/T (log-linear) . log(T) log(A) (Ea/k) (1/T). . . )11()exp()()(adaadTTkETTAF = Ea . , A 5608 3： 2006 9 . 85 125 . 0.7(eV) , Td273 85 358(K), Ta 273 125 398(K), E 0.7(e
14、V) AF exp(0.71/(8.617 110 5)1/3581/398 10 . 125 85 10 . , 85 1 000 125 100 . 7.2 (inverse power relationship) ( , .) ( , , , ) , , , , . V, (V) , . VAV =)( A , , . log(V) log(V) (log-linear) . log(V) log(A) log(V) . )()()(daadVVVVAF = (Coffin-Manson), (Palmgren), (Taylor) . 7.2.1 , (N) (T) . BTAN)(=
15、 A B , . B , . 7.2.2 , B10 ( , ： 106 ) . nPC)(B10= C , P (： ), n . 7.2.3 , . V (feet/sec) , A m , . mVA=50B 7.3 (Eyring relationship) ( ) . (T) (T) . A B , , . A 5608 3： 2006 10 =kTBTAT exp)( 7.4 (generalized Eyring relationship) ( , , ) . (T) (T), (V) . A, B, C, D , . )(exp)(exp)(),(kTDCVkTBTAVT +=
16、 7.4.1 Pecht(1986) , PEM(Plastic Encapsulated Microcircuits) . (T) (RH) . (T, RH) A(RH) nexpE/(kT) , Pecht . Intel (1988) Pecht . (T, RH) Aexp(B RH) expE/(kT) 7.4.2 , T J . , T , J . (T, J) A J nexpE/(kT) 8. 7 . 7 . . ? ? - ? A 5608 3： 2006 11 ? 8.1 . ( ) . 4 4 10 . 1 1 55 , 7 403 . 4 (F：, C： ) 1 2 3 4 Censor Censor Censor Censor 1 55 F 48 F 27 F 6 F 2 96 F 105 F 112 F 166 F 3 123 F 270 F 165 F 278 F 4 310 F 303 F 175 F 300 F 5 350 F 490 F 220 F 320 F 6 403 F 520 F 285 F 335 F 7 403 C 520 C 285 C 335 C 8 403 C 520 C 285 C 335 C 9 403 C 520 C 285 C 335 C 10 403 C 520 C 285 C 335 C 4 .
