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Produced by the NASA Center for Aerospace Information (CASI)
i

tokSA -CE-176370) A MCSAIC INFHARID SENISCR S86 -15220

FGR SPACE ASTECMClY, FBASE 3 Cuarterlp

Report (Hcneywell, Inc.) 6 F 6C A02/MP A01

CSCL 03A unclas

G3/89 04667

A MDSAIC INFRARED SENSOR

FOR SPACE ASTRONOMR

THIRD QUARTMLT REPORT

PHASE III

FOR

NASA HEADQUARTERS

ASTROPHYSICS DIVISION

WASHINGTON, D. C.

DR. NANCY BOGGESS, CONTRACT MDNITOR

lraeq Hartle Marcia C. Gold

project Engineer Program Manager

A .'^ L

Dr.

Principal Investigator

(*AA?

,CC,,

HONEYWELL, INC.

4

2 FORBES ROAD ^FS

en 4

LEXINGTON, MA 02173•

E

0
Note that the array With the lowest W(b) has a very low carrier

ooncentration. It is possible that the sof(b) obtained on ST11 and ST06 is

artificially high due to an inversion layer that would increase the area of

g-r current generation. Further investigations are necessary to determine

the exact source of the high g-r current.

CONCLUSION

One of the three arrays fabricated this quarter with very low carrier

ooncentration shows excellent low temperature performance. Extremely low

g-r currents were observed indicating a well passivated surface. It is

anticipated that very low tunneling currents will be observed at very law

temperatures due to the low base carrier concentration. This array will be

sent to D. Hall for further investigation.

3
Note that the array with the lowest sof(b) has a very low carrier

< concentration. It is possible that the sof(b) obtained on ST11 and ST06 is

artificially high due to an inversion layer that would increase the area of

g-r current generation. Further investigations are necessary to determine

the exact source of the high g-r current.

CONICLUSIONi

One of the three arrays fabricated this quarter with very low carrier

concentration shows excellent low temperature performance. Extremely low

g-r currents were observed indicating a well passivated surface. It is

anticipated that very low tunneling currents will be observed at very low

temperatures due to the low base carrier concentration. This array will be

sent to D. Hall for further investigation.

3
TABLE 1

VAF1R P(73) co(300K) Sof(b)(175L)

ID Gyt um cm/S

ST06 6x1014 2.41 8x105

ST09 1.6x1014 2.40 1x104

ST11 1x1014 2.41 2x105

Summary of the measured electrical characteristic of the three vafers

evaluated this quarter.

It
Or NX- 1'{+^G sJ

OF POOR QU.ALrry

O

v

n -

• ^ v

-

- —- ------------ -----

_-: 7-- -__- _

_ =.---7:T= _-_

- - • - — - - - -t -- -- ---- - - --

^^-- -- --- - -- , -- - - -- -- to-

000 JT L k"1

FIGURE 1. Ro TMIPERATURE DEPENDANCE OF THE THREE ARRAYS ANALYZED
Plot Ls(T) cutoff CT) Na 1 P77 tau o SofCD)

3 55.00(300) 2.40(380) 1.60E+14 1.59E-87 1.BE+04

or

1016 ^^° X48' X86° 160' 1^8' 

115

0

1014

1013

1012

.-. 1011 li

0 1010

10

0

10 $

}

107

10 6

105

10 4

10 3

4 5 6 7 B 9 10 11 1

Invorce Tomperature (1000/°K) ST09

FIGURE 2. ANALYSIS OF THE Ro TPTERATURE SHOWS LOW GENERATION RECOMBINATION

CURRENTS ARE RESPONSIBLE FOR EXCELLED?T MODERATE TEMPERATURE PERFORMANCE.

(0 
e

Plot Lm(T) cutoff(T) Na I p77 tau o so-f(b)

4 25.08(300) 2.41(380) 9.50E+13 7.94E-89 2.BEt05

10 6

280° 2 ,^° 288' 168° 128° 88°

1015

1014

10 13

1012

r., 1@ll

ru

o

10 10

10

0

106

107

6

1@

105

104

10 3 4 l

Inverc• Temporatur• (1000/°K) ST11

FIGURE 3. ANALYSIS OF THE Ro TEMPERATURE DEPENDAYCE SHOWS HIGH GR CURRENTS

DOMINATE MODERATE TEMPERATURE PERFORMANCE.

um
t r

Plot L@(T1 cutoff(T) Na ( p77 tau o Sof(b)

6 15.08(300) 2.41(380) 6.00E+14 1.98E-89 8.8E+05

1016 2W 248' 2W 168' 121' or

1015

1014

1013

101

ti 1011

0 c 10t0

10 0

108

107

106

105

10 4

. " 

10 3 4-LL6 9 1b ll 1

Inverse Temperature (1000/°K) ST06

FIGURE 4. 1UNALYSIS OF THE Ro TEMPERATURE DEPUU)A1ZCE SH01-""--`"--

DOMINATE MODERATE TEMPERATURE PERFORMANCE.

. ;.i r