なかのにっき

Silicon nanocrystals in SiO2 matrix are fabricated by plasma enhanced chemical vapor deposition followed by thermal annealing. The structure and photoluminescence (PL) of the resulting films is investigated as a function of deposition temperature. Drastic improvement of PL efficiency up to 12% is achieved when the deposition temperature is reduced from 250 °C to room temperature. Low-temperature deposition is found to result in a high quality final structure of the films in which the silicon nanocrystals are nearly strain-free, and the Si/SiO2 interface sharp. The demonstration of the superior structural and optical properties of the films represents an important step towards the development of silicon-based light emitters.

This study investigates the dependence of Ag resistivity on film thickness during temperature ramping as a means to access thermal stability. In situ van der Pauw four-point probe analysis is used to determine the onset temperature; the temperature when the electrical resistivity deviates from linearity during the temperature ramp. At that point, the silver thin films become unstable due to void formation and growth during thermal annealing. The thermal stability of Ag thin films on SiO2 in a vacuum is greatest when thicknesses are greater than 85 nm. Using an Arrhenius relation in terms of onset temperature and film thickness, an activation energy (0.32±0.02 eV) for the onset of agglomeration in Ag thin films on SiO2 ramped at a rate of 0.1 °C/s is determined. This value is consistent with the activation energy for surface diffusion of silver in a vacuum, which is believed to be the dominant mechanism for agglomeration of silver thin film.

film(nakano) % sudo ./sg_simple2 -x /dev/sg0
Some of the INQUIRY command's results:
    HPK      PMA              1.2P  [wide=0 sync=0 cmdque=0 sftre=0]
INQUIRY duration=0 millisecs, resid=0, msg_status=0
Test Unit Ready successful so unit is ready!
TEST UNIT READY duration=0 millisecs, resid=0, msg_status=0

typedef struct  pma_inquiry
{
        BYTE bStandard[8];                      /* standard info of device */
        BYTE bVenderIdentification[8];          /* maker ID */
        BYTE bProductIdentification[16];        /* model info */
        BYTE bProductRevisionLevel[4];          /* version info */
        BYTE bSensorType;                       /* sensor spec */
        BYTE bChannelNumber;                    /* channel # of linesensor */
        BYTE bSensorNumber;                     /* # of line sensors */
        BYTE bHeadNumber;                       /* # of line sensor heads */
        BYTE bSpectrometer;                     /* grating spec */
        BYTE bPmaType;                          /* PMA flavor */
        BYTE bWavelength;                       /* WL range */
        BYTE bADType;                           /* A/D bits */
        BYTE bADClock;                          /* A/D clock */
        BYTE bVPixelSize;                       /* vertical pixels */
} pma_inquiry_t;

Some of the INQUIRY command's results:
    HPK      PMA              1.2P
sensor type:    0
channen number: 3
sensor number:  0
head number:    0
grating spec:   3
PMA flavor:     1
WL range:       0
AD bit type:    0
AD clock:       0
v-pixels:       0

typedef struct  pma_parameter
{
        BYTE bFlags1;                   /* bit flag1 */
        BYTE bFlags2;                   /* bit flag2 */
        BYTE bTriggerMode;              /* trigger mode */
        BYTE bTriggerPolarity;          /* trigger polarity */
        BYTE bTransferMode;             /* data endian */
        BYTE bShutter;                  /* shutter status */
        BYTE bIi;                       /* II power */
        BYTE bIiGain;                   /* II gain (0-7) */
        BYTE bAmpGain;                  /* amplifier gain */
        BYTE bStartMode;                /* start mode (0 int; 1 ext) */
        WORD wExposureTime;             /* exposure time (0-32767) */
        WORD wDelayTime;                /* delay time (0-32767) */
        WORD wPixelClockTime;           /* pixcel clock (0-128) */
        WORD wLineNumber;               /* line number status */
        BYTE bIiStatus;                 /* II status (0 normal; 1 protected */
        BYTE bReserved1;                /* reserved */
} pma_parameter_t;

int convEndien(int x){
    const unsigned int MSB_MASK = 0xFF00;
    const unsigned int LSB_MASK = 0x00FF;

    return  ((x & MSB_MASK) >> 8) + ((x & LSB_MASK) << 8);
}

RECEIVE PARAMETER command's results:
bit flag1:            0
bit flag2:            0
trigger mode:         0
trigger polarity:     0
data endian:          0
shutter status:       0
II power:             0
II gain (0-7):        0
amplifier gain:       3
start mode (0 int):   0
exposure time:        19
delay time:           0
pixcel clock:         3
line number status:   0
II status (0 normal): 0

int pma_init(char *device)
int pma_close()
int pma_inquiry()
int pma_rcv_param()

• shutter status
• amplifier gain
• exposure time
• pixcel clock

% wc pma.[ch]
    490    1608   13534 pma.c
    165     597    4304 pma.h

#include <unistd.h>
#include <stdio.h>
#include "pma.h"

int main(int argc, char * argv[])
{
    int k;
    char * file_name = 0;
    pma_parameter_t pma_param;

    unsigned short int * data = 0;
    unsigned int data_len = 0;
    unsigned int c;

    for (k = 1; k < argc; ++k) {
	if (0 == file_name)
	    file_name = argv[k];
	else {
	    printf("too many arguments\n");
	    file_name = 0;
	    break;
	}
    }
    if (0 == file_name) {
	printf("Usage: 'test_pma <sg_device>'\n");
	return 1;
    }

    if (pma_init(file_name) != 0) return 1;
    pma_inquiry(stderr);

    pma_set_amp_gain(AMP_GAIN_MIDDLE);
    pma_set_exposure_time(2000);
    pma_set_pixel_clock(5);

    pma_rcv_param(&pma_param);
    pma_print_param(stderr, &pma_param);

    if (pma_read(&data, &data_len) == 0){
        for (c=0;c<data_len;c++){
	    printf("%4u %d\n", c, *(data + c));
	}
    }
    pma_close();
    return 0;
}

• exposure time が長い時は、SCSI タイムアウトをのばさないとダメかも。
• pma_read に返させるデータ長は、SCSI の output からわかるか？
• マニュアル書き。

(setq default-font
   (get-font "-misc-fixed-medium-r-normal--10-*-*-*-*-*-*-*"))

tiger(nakano) /var/tmp [85] dd if=/dev/zero of=/var/tmp/testimg bs=4096 count=1048576
読み込んだブロック数は 1048576+0
書き込んだブロック数は 1048576+0
4294967296 bytes transferred in 154.021331 seconds (27885536 bytes/sec)
tiger(nakano) /var/tmp [86] ls -l testimg
-rw-r--r--    1 nakano   users    4294967296 2002-11-28 18:43 testimg
tiger(nakano) /var/tmp [88] ftp surfgw
Connected to surfgw.babalab.ap.seikei.ac.jp.
220 ProFTPD 1.2.5rc1 Server (Debian) [surf.ap.seikei.ac.jp]
Name (surfgw:nakano): nakano
331 Password required for nakano.
Password:
230 User nakano logged in.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> cd /home2/nakano
250 CWD command successful.
ftp> put testimg
local: testimg remote: testimg
200 PORT command successful.
150 Opening BINARY mode data connection for testimg.
netout: Connection reset by peer
552 Transfer aborted.  File too large
ftp> close
221 Goodbye.

ftp> open migrate
Connected to migrate.babalab.ap.seikei.ac.jp.
220 ProFTPD 1.2.6 Server (Debian) [migrate.babalab.ap.seikei.ac.jp]
Name (migrate:nakano):
331 Password required for nakano.
Password:
230 User nakano logged in.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> cd /home2/nakano
250 CWD command successful.
ftp> put testimg
local: testimg remote: testimg
200 PORT command successful
150 Opening BINARY mode data connection for testimg
226 Transfer complete.
4294967296 bytes sent in 1034.23 secs (4055.5 kB/s)

  :
  :
pciide0:0:0: lost interrupt
	type: ata b_tcount: 512 tc_skip: 0
pciide0:0:0: bus-master DMA error: missing interrupt, status=0x21

Nov 29 06:26:27 surf kernel: vs-13070: reiserfs_read_inode2: i/o failure occurred trying to find stat data of [55 154261 0x0 SD]
Nov 29 06:26:51 surf kernel: vs-13070: reiserfs_read_inode2: i/o failure occurred trying to find stat data of [51 207839 0x0 SD]
Nov 29 06:26:56 surf kernel: vs-13070: reiserfs_read_inode2: i/o failure occurred trying to find stat data of [51 207839 0x0 SD]
 :
 :

マーク 番号 日付  行数 差出人       サブジェクト名 [        ] (1-23)
          8 11/29   13 root@surf.ap surf 2002/11/29 06:02 system check
 R        9 11/29 4730 root@surf.ap surf 2002/11/29 07:02 system check
 R       10 11/29 8109 root@surf.ap surf 2002/11/29 08:02 system check
 R       11 11/29 7985 root@surf.ap surf 2002/11/29 09:02 system check
 R       12 11/2914920 root@surf.ap surf 2002/11/29 10:02 system check

afrestore -C . etc
afrestore -C . var

grep -B 1 "install ok installed" status | \
grep ^Package | awk '{print $2}' | egrep -v '(fuga|hoge)'

exim -qff

• 起動スクリプトの update-rc.d
• cron job の確認
• カーネル再構築と ipchains (iptables) の再設定。