Silicon Status

SI3 STATUS AT PURDUE Oct 13 1999

STATUS OF CLAMSHELL #1

Layer 1 / 2 first clamshell arrived Ithaca 9/8/99

STATUS OF CLAMSHELL #2

3/3 layer 1 mounted and tested
3/5 layer 2 mounted and tested

CLAMSHELL #2 IS ON HOLD PENDING REPLACEMENT PARTS SINCE 9/15/99

1 layer 2 ladder (FL202) has 55 opens no diamond added . Replacemnet part B56 NL2-25 in process at Purdue (both sides are now wire-bonded 10/12)
1 layer 2 ladder (FL208) has cracked hybrid (about 150 p-side opens, + n-side opens) Replacement parts for this ladder B83/NL2-07 East starter and B117/NL2-10 West starter have been shipped today 10/13, expect arrival at Purdue 10/14.

STATUS OF LAYER 3

18 ladders (126 wafers x2 L1+L2)
100% diamond disassembled
100% diamond cleaned for layer 3
100% v-beams fabricated and certified
15 (15) ladders complete with diamond
1 (1) ladders complete without diamond (FL314)
2 ladders remain to be built
9(10)/18 ladders mounted, 10(10) tested (FL311)
5 (4) ladders ready for mounting
Fraction of all processing complete : 93%
STATUS OF L3 BY LADDER
- FL301 on cone OK (contaminated diamond)
- FL302 on cone OK (contaminated diamond)
- FL303 on cone OK (contaminated diamond)
- FL304 on cone OK (contaminated diamond)
- FL305 on cone OK (contaminated diamond, elevated p-stop current but stable)
- FL306 center contaminated diamond replaced elevated p-stop current but stable, awaits mounting
- FL307 on cone OK (elevated p-stop current but stable)
- FL308 center contaminated diamond replaced, elvated p-stop currentbut stable, awaits mounting since 10/13
- FL309 on cone OK
- FL310 elevated p-stop current but stable, awaits mounting (since 10/11)
- FL311 on cone no n-side strip isolation, large unstable p-stop current de-mounted and inspected. (see Oct 11 report for details) part sent Tuesday to Cornell (will arrive Thursday) for evaluation.
- FL312 on cone (elevated p-stop current but stable)
- FL313 on cone (elevated p-stop current but stable)
- FL314 returned from Cornell last week. Tested fine. Flipped and pulled R/C FE suspect p-side bond (Kirk 10/8) Part now looking good. (Diamond still needs to be added to this part)
- FL315 elevated p-stop current but stable, await mounting (since 10/11)
- FL316 OK awaits mounting
- FL317: not yet made, HL323 and HL407 are ready
- FL318, not yet made HL324 very high n/p currents, removed chipped wafer, glued new wafer to flex sent to Cornell for bonding Tuesday will arrive Thursday.

STATUS OF LAYER 4

26 ladders (260 wafers x2 L3)
100% diamond disassembled
90% diamond cleaned for layer 4
10% of diamond was re-cleaned, 3 vees have been built and 2 of 3 are clean.
25 of 26 v-beams fabricated, 16 of 19 (14 of 16) certified
6 (7) ladders complete without diamond
10 (8) ladders complete with diamond
7 of 10 ladders ready for mounting
0/26 ladders mounted
Fraction of all processing complete : 75%

To complete L4 we need to build:

10(11)Full Ladders (we have HL¹s for 6(7)ladders fully processd (this total includes HL554 at Cornell) 8HL need to be built ( 6 starters not yet at Purdue)
5 out of 8 wafer chains are ready

3 out of 8 wafer chains had 4^th wafer removed all are fine, will re-build WC¹s after WC building machine is put back under CMM

Recovery of HL554 (fried, at Cornell, status

from Eckhart?)

STATUS OF LAYER 4 BY LADDER

FL401 tested 10/11 part OK for mounting
FL402 needs retest before diamond added
FL403 diamond added (10/13) awaits test
FL404 needs retest before diamond added
FL405 needs retest before diamond added
FL406 awaits diamond
FL407 awaits diamond
FL408 tested 10/11 part OK for mounting
FL409 damage noticed optically, awaits test
FL410 diamond added part OK for mounting
FL411 diamond added part OK for mounting
FL412 diamond added part OK for mounting
FL413 diamond added 10/6 OK for mounting
FL414 diamond added OK for mounting
FL415 built 10/8 , diamond added part awaits test
FL416 built 10/12, diamond added part awaits test