LZ23H3V1 1/3-type Interline Color CCD Area Sensor with 1 090 k Pixels LZ23H3V1 The LZ23H3V1 is a 1/3-type (6.0 mm) solid-state image sensor that consists of PN photo-diodes and CCDs (charge-coupled devices). With approximately 1 090 000 pixels (1 217 horizontal x 893 vertical), the sensor provides a stable highresolution color image. • Built-in overflow drain voltage circuit and reset gate voltage circuit • Variable electronic shutter • Package : 16-pin shrink-pitch WDIP [Ceramic] (WDIP016-N-0500C) Row space : 12.70 mm FEATURES PIN CONNECTIONS DESCRIPTION • Optical size : Number of effective pixels – Approx. 1 000 k; 6.6 mm – Approx. 790 k; 5.9 mm (compatible with XGA format) 16-PIN SHRINK-PITCH WDIP OD 1 15 GND OFD 3 14 ØV1A PW 4 13 ØV1B ØRS 5 12 ØV2 NC 6 11 ØV3A (1 024) ØH1 7 10 ØV3B 1 156 ØH2 8 9 ØV4 790 k pixels • • • • • • • 866 6.6 mm (768) (5.9 mm) • 16 OS GND 2 1 000 k pixels • • • • TOP VIEW Interline scan format Square pixel Number of effective pixels : 1 174 (H) x 884 (V) Number of optical black pixels – Horizontal : 3 front and 40 rear – Vertical : 7 front and 2 rear Number of dummy bits – Horizontal : 22 – Vertical : 2 Pixel pitch : 4.6 µm (H) x 4.6 µm (V) R, G, and B primary color mosaic filters Supports monitoring mode Low fixed-pattern noise and lag No burn-in and no image distortion Blooming suppression structure Built-in output amplifier (WDIP016-N-0500C) PRECAUTIONS • The exit pupil position of lens should be 15 to 50 mm from the top surface of the CCD. • Refer to "PRECAUTIONS FOR CCD AREA SENSORS" for details. In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP devices shown in catalogs, data books, etc. Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device. 1 LZ23H3V1 PIN DESCRIPTION SYMBOL OD PIN NAME Output transistor drain OS ØRS Output signals ØV1A, ØV1B, ØV2, ØV3A, ØV3B, ØV4 Vertical shift register clock ØH1, ØH2 Horizontal shift register clock Reset transistor clock OFD Overflow drain PW GND P-well Ground NC No connection ABSOLUTE MAXIMUM RATINGS (TA = +25 ˚C) SYMBOL VOD RATING 0 to +18 UNIT V NOTE VOFD VØRS Internal output Internal output V V 1 2 Vertical shift register clock voltage VØV Horizontal shift register clock voltage VØH VPW to +18 –0.3 to +12 V V Voltage difference between P-well and vertical clock VPW-VØV –29 to 0 V Voltage difference between vertical clocks Storage temperature VØV-VØV TSTG 0 to +15 –40 to +85 V ˚C TOPR –20 to +70 ˚C PARAMETER Output transistor drain voltage Overflow drain voltage Reset gate clock voltage Ambient operating temperature 3 NOTES : 1. Do not connect to DC voltage directly. When OFD is connected to GND, connect VOD to GND. Overflow drain clock is applied below 27 Vp-p. 2. Do not connect to DC voltage directly. When ØRS is connected to GND, connect VOD to GND. Reset gate clock is applied below 8 Vp-p. 3. When clock width is below 10 µs, and clock duty factor is below 0.1%, voltage difference between vertical clocks will be below 28 V. 2 LZ23H3V1 RECOMMENDED OPERATING CONDITIONS PARAMETER Ambient operating temperature SYMBOL TOPR MIN. TYP. 25.0 MAX. UNIT ˚C Output transistor drain voltage Overflow drain clock p-p level VOD 14.55 15.0 15.45 V VØOFD 24.5 Ground P-well voltage GND VPW LOW level Vertical shift register clock INTERMEDIATE level HIGH level VØV1AL, VØV1BL, VØV2L VØV3AL, VØV3BL, VØV4L –9.5 VØV1AI, VØV1BI, VØV2I VØV3AI, VØV3BI, VØV4I VØV1AH, VØV1BH 26.5 V 1 VØVL V V 2 –8.5 V 0.0 –10.0 –9.0 0.0 V 14.55 15.0 15.45 V –0.05 0.0 0.05 V V Horizontal shift LOW level VØV3AH, VØV3BH VØH1L, VØH2L register clock HIGH level VØH1H, VØH2H 4.5 5.0 5.5 VØRS 4.5 5.0 5.5 Reset gate clock p-p level Vertical shift register clock frequency Horizontal shift register clock frequency NOTE V 1 kHz 3 fØV1A, fØV1B, fØV2 10.88 fØV3A, fØV3B, fØV4 13.47 kHz 4 14.32 MHz 3 18.00 MHz 4 14.32 18.00 MHz MHz 3 4 fØH1, fØH2 Reset gate clock frequency fØRS NOTES : 1. Use the circuit parameter indicated in "SYSTEM CONFIGURATION EXAMPLE", and do not connect to DC voltage directly. 2. VPW is set below VØVL that is low level of vertical shift register clock, or is used with the same power supply that is connected to VL of V driver IC. 3. Operation frequency is 14.32 MHz. 4. Operation frequency is 18.00 MHz. * To apply power, first connect GND and then turn on VOD. After turning on VOD, turn on PW first and then turn on other powers and pulses. Do not connect the device to or disconnect it from the plug socket while power is being applied. 3 LZ23H3V1 CHARACTERISTICS (Drive method : 1/30 s frame accumulation) (TA = +25 ˚C, Operating conditions : The typical values specified in "RECOMMENDED OPERATING CONDITIONS". Color temperature of light source : 3 200 K, IR cut-off filter (CM-500, 1 mmt) is used.) PARAMETER Standard output voltage SYMBOL VO Photo response non-uniformity PRNU Saturation output voltage VSAT Dark output voltage VDARK Dark signal non-uniformity DSNU Sensitivity (green channel) Smear ratio R SMR Image lag MIN. TYP. 150 450 530 330 410 mV 5 10 105 ABL IOD Line crawling LCR UNIT mV NOTE 2 % 3 mV 4 0.5 0.5 3.0 2.0 mV mV 1, 6 1, 7 150 –75 –65 mV dB 8 9 1.0 % 10 AI Blooming suppression ratio Output transistor drain current MAX. 500 11 4.0 8.0 mA 3.0 % 12 NOTES : • Within the recommended operating conditions of VOD, VOFD of the internal output satisfies with ABL larger than 500 times exposure of the standard exposure conditions, and VSAT larger than 330 mV. 1. TA = +60 ˚C 2. The average output voltage of G signal under uniform illumination. The standard exposure conditions are defined as when Vo is 150 mV. 3. The image area is divided into 10 x 10 segments under the standard exposure conditions. Each segment's voltage is the average output voltage of all pixels within the segment. PRNU is defined by (Vmax – Vmin)/Vo, where Vmax and Vmin are the maximum and minimum values of each segment's voltage respectively. 4. The image area is divided into 10 x 10 segments. Each segment's voltage is the average output voltage of all pixels within the segment. VSAT is the minimum segment's voltage under 10 times exposure of the standard exposure conditions. The operation of OFDC is high. (for still image capturing) 5. The image area is divided into 10 x 10 segments. Each segment's voltage is the average output voltage of all pixels within the segment. VSAT is the minimum segment's voltage under 10 times exposure of the standard exposure conditions. The operation of OFDC is low. 6. The average output voltage under non-exposure conditions. 7. The image area is divided into 10 x 10 segments under non-exposure conditions. DSNU is defined by (Vdmax – Vdmin), where Vdmax and Vdmin are the maximum and minimum values of each segment's voltage respectively. 8. The average output voltage of G signal when a 1 000 lux light source with a 90% reflector is imaged by a lens of F4, f50 mm. 9. The sensor is exposed only in the central area of V/10 square with a lens at F4, where V is the vertical image size. SMR is defined by the ratio of the output voltage detected during the vertical blanking period to the maximum output voltage in the V/10 square. 10. The sensor is exposed at the exposure level corresponding to the standard conditions. AI is defined by the ratio of the output voltage measured at the 1st field during the non-exposure period to the standard output voltage. 11. The sensor is exposed only in the central area of V/10 square, where V is the vertical image size. ABL is defined by the ratio of the exposure at the standard conditions to the exposure at a point where blooming is observed. 12. The sensor is exposed at the exposure level corresponding to the standard conditions. LCR is defined by (∆VG/VO) x 100, where ∆VG is the difference between the average output voltage of G signal at the 1st field, and that of G signal at the 2nd field. 4 LZ23H3V1 PIXEL STRUCTURE yyyyyyyyy ,,,,,,,,, ,,,,,,,,, yyyyyyyyy ,,,,,,,,, yyyyyyyyy ,,,,,,,,, yyyyyyyyy ,,,,,,,,, yyyyyyyyy yyyyyyyyy ,,,,,,,,, yyyyyyyyy ,,,,,,,,, OPTICAL BLACK (2 PIXELS) OPTICAL BLACK (3 PIXELS) OPTICAL BLACK (40 PIXELS) 1 174 (H) x 884 (V) 1 pin OPTICAL BLACK (7 PIXELS) COLOR FILTER ARRAY (1, 884) Pin arrangement of the vertical readout clock (1 174, 884) ØV3B G B G B G B G B G B ØV1A R G R G R G R G R G ØV3A G B G B G B G B G B ØV1B R G R G R G R G R G ØV3B G B G B G B G B G B ØV1A R G R G R G R G R G ØV3A G B G B G B G B G B ØV1B R G R G R G R G R G ØV3B G B G B G B G B G B ØV1A R G R G R G R G R G ØV3A G B G B G B G B G B ØV1B R G R G R G R G R G (1, 1) (1 174, 1) 5 LZ23H3V1 TIMING CHART TIMING CHART EXAMPLE Pulse diagram in more detail is shown in the figure q to t after next page. Field accumulation mode Frame accumulation Frame accumulation mode mode at first q q w e r Field accumulation mode at first e' t Field accumulation mode q VD ØV1A ØV1B ØV2 ØV3A ØV3B ØV4 ØOFD (at OFD shutter operation) OFDC OS (Number of vertical line) Field accumulation mode (2.3..882.883) (2.3..882.883) Not for use (NOTE 1) Not for use (NOTE 1) Frame accumulation mode (2.4..882.884) (1.3..881.883) Not for use Field accumulation (NOTE 2) mode (2.3..882.883) NOTES : 1. Do not use these signals immediately after field accumulation mode is transferred to frame accumulation mode for still image capturing. 2. Do not use these signals immediately after frame accumulation mode is transferred to field accumulation mode for monitoring mode image. * Apply at least an OFD shutter pulse to OFD in each field accumulation mode. q VERTICAL TRANSFER TIMING FOR 14.3 MHz OPERATION ¿FIELD ACCUMULATION MODE¡ 453 1 6 10 Shutter speed 1/1 000 s HD VD ØV1A ØV1B ØV2 ØV3A ØV3B ØV4 ØOFD OFDC OS 874 875 878 879 882 883 OB2 GB RG GB RG GB RG OB1 OB2 OB5 OB6 2 3 6 7 10 11 14 15 18 19 GB RG GB RG GB RG GB RG GB RG * Do not use the field signals immediately after frame accumulation mode is transferred to field accumulation mode. 6 LZ23H3V1 w VERTICAL TRANSFER TIMING FOR 14.3 MHz OPERATION ¿FRAME ACCUMULATION MODE AT FIRST¡ 453 1 6 Shutter speed 1/1 000 s 10 HD VD ØV1A ØV1B ØV2 ØV3A ØV3B ØV4 ØOFD OFDC OS 874 875 878 879 882 883 OB2 GB RG GB RG GB RG Not for use * Do not use the frame signals immediately after field accumulation is transferred to frame accumulation mode. (2nd FIELD) e, e' VERTICAL TRANSFER TIMING FOR 14.3 MHz OPERATION ¿FRAME ACCUMULATION MODE¡ 453 454 459 463 HD VD ØV1A ØV1B ØV2 ØV3A ØV3B ØV4 ØOFD OFDC OS e Not for use OS e' Not for use 872 874 876 878 880 882 884 OB2 GB GB GB GB GB GB GB OB2 OB4 OB6 1 3 5 7 9 11 13 15 17 19 RG RG RG RG RG RG RG RG RG RG * Do not use the frame signals immediately after field accumulation mode is transferred to frame accumulation mode. 7 LZ23H3V1 (1st FIELD) r VERTICAL TRANSFER TIMING FOR 14.3 MHz OPERATION ¿FRAME ACCUMULATION MODE¡ 900 906 1 6 10 HD VD ØV1A ØV1B ØV2 ØV3A ØV3B ØV4 Charge swept transfer (658 stages) ØOFD OFDC OB1 OB3 OB5 OB7 OS 2 4 6 8 10 12 14 GB GB GB GB GB GB GB Not for use * Do not use the frame signals immediately after field accumulation mode is transferred to frame accumulation mode. t VERTICAL TRANSFER TIMING FOR 14.3 MHz OPERATION ¿FIELD ACCUMULATION MODE AT FIRST¡ 906 1 6 Shutter speed 1/1 000 s 10 HD VD ØV1A ØV1B ØV2 ØV3A ØV3B ØV4 ØOFD OFDC OS 873 875 877 879 881 883 OB1 RG RG RG RG RG RG Not for use * Do not use the field signals immediately after frame accumulation mode is transferred to field accumulation mode. 8 LZ23H3V1 READOUT TIMING FOR 14.3 MHz OPERATION ¿FIELD ACCUMULATION MODE¡ 132 1316, 1 HD 1316, 1 588 ØV1A 48 80 660 536 392 ØV1B 64 96 552 408 ØV2 436 ØV3A 40 88 384 508 544 ØV3B 400 56 104 560 ØV4 5.03 µs (72 bits) 30.5 µs (436 bits) 41.1 µs (588 bits) 5.03 µs (72 bits) 91.9 µs (1 316 bits) READOUT TIMING FOR 14.3 MHz OPERATION ¿FRAME ACCUMULATION MODE AT FIRST¡ 132 1316, 1 HD 1316, 1 588 ØV1A 48 80 660 536 392 ØV1B 64 96 408 552 ØV2 436 ØV3A 40 88 384 508 544 ØV3B 56 104 400 560 ØV4 30.5 µs (436 bits) 41.1 µs (588 bits) 5.03 µs (72 bits) 5.03 µs (72 bits) 91.9 µs (1 316 bits) 9 LZ23H3V1 READOUT TIMING FOR 14.3 MHz OPERATION ¿FRAME ACCUMULATION MODE¡ (1st FIELD) 132 1 1316, 1 HD 48 ØV1A ØV1B 80 64 ØV2 96 476 548 40 ØV3A ØV3B 88 56 104 ØV4 5.03 µs (72 bits) 33.2 µs (476 bits) (2nd FIELD) 1316, 1 132 1 HD 476 548 ØV1A ØV1B 48 80 48 80 64 96 ØV2 ØV3A ØV3B 64 96 40 88 40 88 56 104 ØV4 56 104 5.03 µs (72 bits) 33.2 µs (476 bits) HORIZONTAL TRANSFER TIMING FOR 14.3 MHz OPERATION HD 1316, 1 132 40 ØH1 117.5 ØH2 ØRS OS ..1174 PRE SCAN (22) OB (3) OUTPUT (1 174) 1πππ OB (40) 80 48 ØV1A ØV1B 96 64 ØV2 ØV3A ØV3B 88 40 56 104 ØV4 72 ØOFD 10 92 LZ23H3V1 CHARGE SWEPT TRANSFER TIMING FOR 14.3 MHz OPERATION 900H 901H 902H 1 905H 906H 1H 2H 3H 4H 5H 6H • • • • • 132 1316 HD ØV1A ØV1B 2 14 26 38 50 8 1306 20 32 44 1312 ØV2 ØV3A ØV3B 2 14 26 38 50 8 20 32 44 1 2 1306 1312 ØV4 3 4 656 • • • • • • • 657 658 q VERTICAL TRANSFER TIMING FOR 18.0 MHz OPERATION ¿FIELD ACCUMULATION MODE¡ 442 449 1 6 10 Shutter speed 1/1 000 s HD VD ØV1A ØV1B ØV2 ØV3A ØV3B ØV4 ØOFD OFDC OS 858 859 862 863 866 867 870 871 874 875 878 879 882 883 OB2 GB RG GB RG GB RG GB RG GB RG GB RG GB RG OB1 OB2 OB5 OB6 2 3 6 7 10 11 GB RG GB RG GB RG * Do not use the field signals immediately after frame accumulation mode is transferred to field accumulation mode. 11 LZ23H3V1 w VERTICAL TRANSFER TIMING FOR 18.0 MHz OPERATION ¿FRAME ACCUMULATION MODE AT FIRST¡ 442 449 1 6 Shutter speed 1/1 000 s 10 HD VD ØV1A ØV1B ØV2 ØV3A ØV3B ØV4 ØOFD OFDC OS 858 859 862 863 866 867 870 871 874 875 878 879 882 883 OB2 GB RG GB RG GB RG GB RG GB RG GB RG GB RG Not for use * Do not use the field signals immediately after frame accumulation mode is transferred to field accumulation mode. (2nd FIELD) e, e' VERTICAL TRANSFER TIMING FOR 18.0 MHz OPERATION ¿FRAME ACCUMULATION MODE¡ 449 450 455 459 HD VD ØV1A ØV1B ØV2 ØV3A ØV3B ØV4 ØOFD OFDC OS e OS e' Not for use Not for use 856 858 860 862 864 866 868 870 872 874 876 878 880 882 884 OB2 GB GB GB GB GB GB GB GB GB GB GB GB GB GB GB OB2 OB4 OB6 1 3 5 7 9 11 RG RG RG RG RG RG * Do not use the field signals immediately after frame accumulation mode is transferred to field accumulation mode. 12 LZ23H3V1 (1st FIELD) r VERTICAL TRANSFER TIMING FOR 18.0 MHz OPERATION ¿FRAME ACCUMULATION MODE¡ 888 898 1 6 10 HD VD ØV1A ØV1B ØV2 ØV3A ØV3B ØV4 Charge swept transfer (668 stages) ØOFD OFDC OB1 OB3 OB5 OB7 OS 2 4 6 8 GB GB GB GB Not for use * Do not use the frame signals immediately after field accumulation mode is transferred to frame accumulation mode. t VERTICAL TRANSFER TIMING FOR 18.0 MHz OPERATION ¿FIELD ACCUMULATION MODE AT FIRST¡ 898 1 6 Shutter speed 1/1 000 s 10 HD VD ØV1A ØV1B ØV2 ØV3A ØV3B ØV4 ØOFD OFDC OS 857 859 861 863 865 867 869 871 873 875 877 879 881 883 OB1 RG RG RG RG RG RG RG RG RG RG RG RG RG RG Not for use * Do not use the field signals immediately after frame accumulation mode is transferred to field accumulation mode. 13 LZ23H3V1 READOUT TIMING FOR 18.0 MHz OPERATION ¿FIELD ACCUMULATION MODE¡ 1336, 1 HD 132 50 90 ØV1A 1336, 1 480 660 725 815 ØV1B 70 110 500 680 ØV2 470 40 100 ØV3A 535 625 670 ØV3B 490 60 120 ØV4 690 5.00 µs 29.7 µs (535 bits) (90 bits) 41.1 µs (588 bits) 5.00 µs (90 bits) 74.2 µs (1336 bits) READOUT TIMING FOR 18.0 MHz OPERATION ¿FRAME ACCUMULATION MODE AT FIRST¡ 1336, 1 HD ØV1A 132 50 90 1336, 1 480 660 725 815 ØV1B 70 110 500 680 ØV2 ØV3A 470 40 100 535 625 670 ØV3B ØV4 490 60 120 690 5.00 µs 29.7 µs (535 bits) (90 bits) 41.1 µs (588 bits) 5.00 µs (90 bits) 74.2 µs (1 336 bits) 14 LZ23H3V1 READOUT TIMING FOR 18.0 MHz OPERATION ¿FRAME ACCUMULATION MODE¡ (1st FIELD) 1 1336, 1 132 HD 50 ØV1A ØV1B 90 70 110 ØV2 ØV3A ØV3B 585 675 40 100 60 ØV4 120 5.00 µs 32.5 µs (585 bits) (2nd FIELD) 1 HD ØV1A ØV1B (90 bits) 132 1336, 1 585 675 50 90 50 90 70 110 70 110 40 100 40 100 ØV2 ØV3A ØV3B 60 120 60 120 ØV4 5.00 µs 32.5 µs (585 bits) (90 bits) HORIZONTAL TRANSFER TIMING FOR 18.0 MHz OPERATION HD 1336, 1 132 40 ØH1 137.5 ØH2 ØRS OS ..1174 PRE SCAN (22) OB (3) OUTPUT (1 174) 1πππππππ OB (40) 90 50 ØV1A ØV1B 110 70 ØV2 ØV3A ØV3B 40 100 60 120 ØV4 80 ØOFD 15 105 LZ23H3V1 CHARGE SWEPT TRANSFER TIMING FOR 18.0 MHz OPERATION 888H 889H 890H 1 897H 898H 1H • • • • • 2H 3H 4H 5H 6H 132 1336 HD ØV1A ØV1B 2 18 34 50 66 1322 10 26 42 58 1330 ØV2 ØV3A ØV3B 2 18 34 50 66 1322 10 26 42 58 1330 ØV4 1 2 3 4 • • • • • • • 16 666 667 668 V2 NC V4 V3B V3A V1B V1A VMa VH 17 13 14 15 16 17 18 19 20 21 22 23 24 1 VOFDH VDD +3.3 V V3X VH1AX V1X V2X OFDX VH3BX VOFDH VL LR36685 VMb 2 POFD 3 9 8 7 6 5 (*1) 4 270 pF 3 (*1) 2 1 10 11 12 13 14 15 16 LZ23H3V1 ØH2 4 + 5 ØH1 6 1 M$ NC 7 0. 01 µF ØRS 8 0. 47 µF PW 9 ØV1B ØV2 ØV3A ØV3B ØV4 (*1) ØRS, OFD : Use the circuit parameter indicated in this circuit example, and do not connect to DC voltage directly. 100 $ OFD 12 11 10 18 k$ 1 M$ CCD OUT + V4X VH3AX 5.6 k$ GND VH1BX VH ØH2 VL (VPW) ØRS ØH1 OFDC OD + VOD LZ23H3V1 SYSTEM CONFIGURATION EXAMPLE OS GND ØV1A VH3BX OFDX V2X V1X VH1AX V3X GND + VH3AX V4X VH1BX + PACKAGES FOR CCD AND CMOS DEVICES PACKAGE (Unit : mm) 16 WDIP (WDIP016-N-0500C) θ CCD Glass Lid 1.66±0.10 6.20±0.15 16 12.40±0.15 0.60±0.60 1.40±0.60 11.20±0.10 (◊) Center of effective imaging area and center of package (◊ : Lid's size) 9 7.00±0.15 CCD Package (Cerdip) 0.04 Cross Section A-A' 8 Rotation error of die : ¬ = 1.5˚MAX. A P-1.78TYP. A' 0.46TYP. 0.90TYP. 0.25 M 2.63TYP. 1.05MIN. 3.90±0.30 1.27±0.25 2.60±0.20 14.00±0.15 5.24MAX. 3.42±0.25 11.20±0.10 (◊) 0.80±0.05 (◊) 1 0.25±0.10 12.70±0.25 18 PRECAUTIONS FOR CCD AREA SENSORS PRECAUTIONS FOR CCD AREA SENSORS (In the case of plastic packages) – The leads of the package are fixed with package body (plastic), so stress added to a lead could cause a crack in the package body (plastic) in the jointed part of the lead. 1. Package Breakage In order to prevent the package from being broken, observe the following instructions : 1) The CCD is a precise optical component and the package material is ceramic or plastic. Therefore, ø Take care not to drop the device when mounting, handling, or transporting. ø Avoid giving a shock to the package. Especially when leads are fixed to the socket or the circuit board, small shock could break the package more easily than when the package isn’t fixed. 2) When applying force for mounting the device or any other purposes, fix the leads between a joint and a stand-off, so that no stress will be given to the jointed part of the lead. In addition, when applying force, do it at a point below the stand-off part. Glass cap Package Lead Fixed Stand-off 3) When mounting the package on the housing, be sure that the package is not bent. – If a bent package is forced into place between a hard plate or the like, the package may be broken. 4) If any damage or breakage occurs on the surface of the glass cap, its characteristics could deteriorate. Therefore, ø Do not hit the glass cap. ø Do not give a shock large enough to cause distortion. ø Do not scrub or scratch the glass surface. – Even a soft cloth or applicator, if dry, could cause dust to scratch the glass. (In the case of ceramic packages) – The leads of the package are fixed with low melting point glass, so stress added to a lead could cause a crack in the low melting point glass in the jointed part of the lead. Low melting point glass Lead 2. Electrostatic Damage As compared with general MOS-LSI, CCD has lower ESD. Therefore, take the following anti-static measures when handling the CCD : 1) Always discharge static electricity by grounding the human body and the instrument to be used. To ground the human body, provide resistance of about 1 M$ between the human body and the ground to be on the safe side. 2) When directly handling the device with the fingers, hold the part without leads and do not touch any lead. Fixed Stand-off 19 PRECAUTIONS FOR CCD AREA SENSORS ø The contamination on the glass surface should be wiped off with a clean applicator soaked in Isopropyl alcohol. Wipe slowly and gently in one direction only. – Frequently replace the applicator and do not use the same applicator to clean more than one device. ◊ Note : In most cases, dust and contamination are unavoidable, even before the device is first used. It is, therefore, recommended that the above procedures should be taken to wipe out dust and contamination before using the device. 3) To avoid generating static electricity, a. do not scrub the glass surface with cloth or plastic. b. do not attach any tape or labels. c. do not clean the glass surface with dustcleaning tape. 4) When storing or transporting the device, put it in a container of conductive material. 3. Dust and Contamination Dust or contamination on the glass surface could deteriorate the output characteristics or cause a scar. In order to minimize dust or contamination on the glass surface, take the following precautions : 1) Handle the CCD in a clean environment such as a cleaned booth. (The cleanliness level should be, if possible, class 1 000 at least.) 2) Do not touch the glass surface with the fingers. If dust or contamination gets on the glass surface, the following cleaning method is recommended : ø Dust from static electricity should be blown off with an ionized air blower. For antielectrostatic measures, however, ground all the leads on the device before blowing off the dust. 4. Other 1) Soldering should be manually performed within 5 seconds at 350 °C maximum at soldering iron. 2) Avoid using or storing the CCD at high temperature or high humidity as it is a precise optical component. Do not give a mechanical shock to the CCD. 3) Do not expose the device to strong light. For the color device, long exposure to strong light will fade the color of the color filters. 20