Joy Technology Co.,Limited

Printed tin mesh opening shape and size requirements: ?
1. General principle: According to the IPC-7525 steel mesh design guideline, in order to ensure that the solder paste can be smoothly released from the stencil opening to the PCB pad, the opening of the stencil is viewed.兀? 1,) area ratio / width to thickness ratio area ratio > 0.66 2) mesh hole wall is smooth. Especially for QFP and CSP with a pitch of less than 0.5mm, the supplier is required to perform electropolishing during the manufacturing process. 3)) With the printed surface as the top, the opening under the mesh should be 0.01mm or 0.02mm wider than the upper opening, that is, the opening is inverted to facilitate the release of the solder paste, and the number of cleaning of the stencil can be reduced. Normally, the SMT component has a stencil opening size and shape that is consistent with the pad and opens in a 1:1 manner. In special cases, some special SMT components have special provisions for the size and shape of the stencil opening.

2 Special SMT component stencil opening:
2.1 CHIP components: CH603 components above 0603, in order to effectively prevent the generation of tin beads.
2.2 SOT89 components: Due to the small pad spacing between the pads and components, it is easy to produce soldering quality problems such as solder balls. 
2.3 SOT252 component: Since the SOT252 has a large pad, it is easy to produce tin beads, and the reflow soldering tension causes a large displacement.
2.4IC: A. For a standard pad design, an IC with a PITCH of = 0.65 mm has an opening width of 90% of the pad width and a constant length. B. For the standard pad design, PITCH "= 005mm IC, due to its small PITCH, is easy to bridge, the stencil opening mode has the same length direction, the opening width is 0.5PITCH, and the opening width is 0.25mm.
2.5 Other cases: When a pad is too large, usually one side is larger than 4mm and the other side is not less than 2.5mm, in order to prevent the generation of tin beads and the displacement caused by tension, the mesh opening is recommended to adopt grid line segmentation. The grid width is 0.5mm and the grid size is 2mm, which can be equally divided by the pad size.

JOY TECHNOLOGY CO.,LIMITED can supply other DEK Part:
DEK CAMERA 133828
DEK CAMERA 145016
DEK CAMERA 145550
DEK CAMERA 145550,181062
DEK CAMERA 155826 (new)181322
DEK CAMERA 181056
DEK CAMERA 181062
DEK CBA40 GRAPHITE CAMERA 191640 8008629
DEK CBA40 CAMERA
DEK CBA40 GOLD CAMERA 191012 8008632
DEK CBA40 GRAPHITE CAMERA 191010 8008629
DEK CBA40 GRAPHITE CAMERA 198040 8012979
DEK CBA40 GRAPHITE CAMERA 8008629
DEK CBA40 GREEN CAMERA 191011 8008630
DEK CBA40 GREEN CAMERA 191641 8008630
DEK CBA40 GREEN CAMERA 198041 8012980
DEK CBA40 GREEN CAMERA 198811 8008630
DEK CBA40 HAWKEYE 1200 CAMERA 191644 8008634
DEK CBA40 HAWKEYE 1700 CAMERA 198044 8012983
DEK CBA40 HAWKEYE 400 CAMERA 191643 8008633
DEK CBA40 HAWKEYE 750 CAMERA 198043 8012982
DEK CBA40 HAWKEYE CAMERA 191013 8008633
DEK Part 191643 24v CAMERA
DEK Part 181322 DEK ela camera
DEK Part 198043 DEK I camera
DEK Part 198041 DEK I camera (205745)
DEK Part 198041 DEK green camera 205711
DEK Part 191641 DEK I camera
DEK Part 191643 DEK I camera 12v
DEK Part 119673
DEK Part 158982 plate snugger base variable th
DEK Part 178002 plate snugger foil-less 250 lon
DEK Part 156458 STRAIN GAUGE BEAM, BOM WITH FEEDBACK 
DEK Part 155870 TYPHOON LOAD CELL LOOM BOM
DEK Part 112246 photo sensor
DEK Part 153073 DEK TORQUE AMP ASSEMBLY BOM ( TXT )
DEK Part 155510 DUAL STEPPER CARD ( TXT )
DEK Part 114025 EUROAMP 10 CARD UL
DEK Part 155506 SERVO STEPPER DRIVE BACKPLANE PCB ASSY ( TXT )
DEK Part 155518
DEK Part 160947 ATOM PC BOARD (COMPLETE)( TXT )
DEK Part 181516 ADVANTECH BP W_250W PFC PSU (TXT)
DEK Part 155945 BOM OF M24 DC POWER SUPPLY MODULE
DEK Part 160555 SMPSU, 650W WIDE RANGE I-P (FASTON TERMS) (TXT)
DEK Part 181229 BOM^LOOM & MOTOR^CONVEYOR^ (TXT)
DEK Part 157731 REAR RAIL MOTOR & LOOM ASSEMBLY
DEK Part 156918 RAIL MOTOR & LOOM ASSEMBLY
DEK Part 155692 MOVING RAIL LOOM BOM(inf)
DEK Part 158921 CYLINDER^PNEUMATIC^COMPACT^12X10
DEK Part 140454 MOVING RAIL STEPPER BOM ( TXT )
SMT DEK VISION Y AXIS SERVO MOTOR 185003 BG65X50-CI


DEK Part 160422 SPEED UP REAR RAIL MOTOR AND LOOM ASSEMBLY BOM
DEK Part 160418 SPEED UP FRONT RAIL MOTOR AND LOOM ASSEMBLY BOM
DEK Part 140472 RAIL MOTOR & LOOM ASSEMBLY
DEK Part 140988 MOVING RAIL STEPPER BOM ( TXT )
DEK Part 155804 BOM^STEPPER MOTOR^FRONT SQY(TXT)
DEK Part 155806 BOM^STEPPER MOTOR^REAR SQY(TXT)
DEK Part 109239 PHOTO SENSOR, SUNX
DEK Part 140737 MOTOR RISING TABLE
DEK Part 160708 RISING TABLE SERVO MOTOR ( TXT )
DEK Part 133129 TABLE LIFT MOTOR
DEK Part 165675 BLUE U S C LIFT CYLINDER REPLACEMENT
602162*2 BLUE U S C LIFT CYLINDER REPLACEMENT
DEK Part 146111 USC SOLVENT SOLENOID VALVE LOOM BOM ( TXT )
DEK Part 165670 USC SOLVENT SOLENOID VALVE LOOM BOM ( TXT )
DEK Part 165432 SOLENOID VALVE 3 PORT 2 POSITION (SMC)
DEK Part 165431 SOLENOID VALVE 5 PORT 2 POSITION (SMC)
DEK Part 107850 bord stoper
DEK Part 160077 MULTIMOVE CAN I/O CARD ( TXT )
DEK Part 181062 green Camera
DEK Part 181379 Dual stepper SMT
DEK Part 185311 Cosel600W 48V SW SW/Mode CPK600PSS48
DEK Part 188285 Bom Stepper motor " front " SQY ( TXT )


DEK Part 160457 Clutch
DEK Part 185312 PSU Cocel 450W Multi O/P
DEK Part 185253 Nextmove ES USB step controller
DEK Part D193205/157274 520mm BOM SQUEEGEE USC
DEK Part D-157382/D-193202 (400MM)BOM SQUEEGEE USC
DEK Part D183961/D-193377 DEK baord stop D- 107850
DEK Part 137037 SCB 46 BRIDGE DRIVER
DEK Part 145116 PCADADIO CARD (DIFFERENTIAL I/P)
141520 NODE, FLAT BELT (5mm)
158175 TIMING BELT, 16T5X245
157936 BELT^TIMING Y TRANSFER ( TXT )
G4976 BELT ,TIMING (16T5/525) EA
G4955 2mm GREEN BELT MT
G4954 BELT ,TIMING (16T5/400) EA
G4952 BELT ,TIMING (6T5/200) EA
G4951 BELT ,TIMING (16T5/1215) EA
G4941 BELT ,TIMING (6T5/420) EA
G4930 BELT ,TIMING (ENILENGTH) (6T5/1740)(TXT) EA
G4921 BELT ,TIMING (25T5/1755) EA
G4915 BELT ,TIMING (16T10/530) EA
G1296 BELT ,TIMING (16T5/500) EA
G1280 BELT ,TIMING (10T5/1380) EA
G1237 BELT ,TIMING (16T5/330) EA
G1217 BELT ,TIMING (6T5/270) EA
G1212 BELT ,TIMING (6T5/280) EA
G1197 BELT ,TIMING (10T5/255) EA
G1142 BELT ,TIMING (10T5/260) EA
G1140 BELT ,TIMING (6T5/185) EA
G1137 BELT ,TIMING (ENILENGTH) (6T5/1490) EA
500170 TIMING BELT 16T10/2350 EA
190642 BELT^TIMING^^15T5/390 EA
188871 BELT^TIMING^6T5/1380^PASTE DISP EA
500169 TIMING BELT 16T10/2670 EA
188801 PLATE^BELT CLAMP^AT5 EA
188682 DRIVE BELT^CAMERA X^STD (TXT) EA
188681 DRIVE BELT^CAMERA Y^STD (TXT) EA
186979 BELT^DRIVE^AT5^ EA
185935 DRIVE BELT^PRINT CARRIAGE^ (TXT) EA
185934 DRIVE BELT^TABLE LIFT EA
183470 BELT^ROUND^3mm^ANTISTATIC (TXT) EA
178448 BELT^^2MM X 816 LG ANTISTATIC^ EA
178447 BELT^^3MM X 841MM ANTISTATIC^ EA
178445 BELT^^2MM X 816 LONG^ (TXT) EA
178395 BELT^ROUND^^ESD (TXT) EA
173146 TIMING BELT^PRINT CARRIAGE^248 ( TXT ) EA
168035 TIMING BELT,5MRX6 (OPEN ENDED) EA





DEK CBA40 GRAPHITE CAMERA 191640 8008629
DEK CBA40 CAMERA
DEK CBA40 GOLD CAMERA 191012 8008632
DEK CBA40 GRAPHITE CAMERA 191010 8008629
DEK CBA40 GRAPHITE CAMERA 198040 8012979
DEK CBA40 GRAPHITE CAMERA 8008629
DEK CBA40 GREEN CAMERA 191011 8008630
DEK CBA40 GREEN CAMERA 191641 8008630
DEK CBA40 GREEN CAMERA 198041 8012980
DEK CBA40 GREEN CAMERA 198811 8008630
DEK CBA40 HAWKEYE 1200 CAMERA 191644 8008634
DEK CBA40 HAWKEYE 1700 CAMERA 198044 8012983
DEK CBA40 HAWKEYE 400 CAMERA 191643 8008633
DEK CBA40 HAWKEYE 750 CAMERA 198043 8012982
DEK CBA40 HAWKEYE CAMERA 191013 8008633


DEK VISION Y AXIS SERVO MOTOR 133128/160706/145520 D-160706/D-145520/ D-133128
DEK TABLE RISING SERVO MOTOR 160708/140737/ D-160708/D-140737
DEK VISION X AXIS SERVO MOTOR 133127/160704/145817 D-160704/D-145817/ D-133127
DEK RAIL MOTOR 157729/157731 D-157729/D-157731
DEK PAPER CLEAN MOTOR  181452/157373/129352/D-181452/D-157373/D-129352
DEK BOM CAMERA ASSY GREEN  145550 (compatible 155826 181501 181322)
DEK BOM CAMERA ASSY GRAPHITE 2Q  181322(compatible 145550 155826 181062)
DEK ACTUATOR LEADSCREW ASSY 158472
DEK PROCESSOR BOARD COMPLETE (INFINITY) 159224
DEK SINGLE BOARD COMPUTER (ADVANTECH T-PCA6180E2002) 181009/160947
DEK PROCESSOR CARD (386 SX,8 MB) 140069
DEK PROCESSOR BOARD(486 8MB RAM 100MHz) 137325
DEK REAR/FRONT SQUEEGEE MOTOR 155806/155804 /D-155806/D-155804
DEK MODIFIED LEAD SCREW(ROLLER ACTUATOR)  158472/D-158472
DEK CPU CARD  159224/160992/181009/159198/160947/D-159224/D-160992/D-181009/D-159198/D-160947
DEK PC CONTROLLER ICL ROHS COMPLIANT  191022/191543
DEK TORQUE AMP ASSEMBLY BOM 153073
DEK EUROAMP 10 CARD UL  114025
DEK CARD EXPANSION FIREWIRE UNIBRAIN  191015/D-191015
DEK PC SPARE PSU IBUS PC  190722
DEK PC POWER  190696/D-190696
DEK BOM BOARDSTOP KIT LIP SEAL  183961
DEK CYLINDER 4 STROKE 20 BORE 165675
DEK BOM BOARDSTOP KIT LIP SEAL 193377
DEK MODIFIED CYLINDER (FROM 107460) 107850
DEK ASSY BOARD CLAMPS QUICK RELEASE 250MM  178031


DEK VISION Y AXIS SERVO MOTOR(DEK Y motor)133128/160706/145520 D-160706/D-145520/ D-133128
DEK RISING TABLE SERVO MOTOR(DEK motor)160708/140737 D-160708/D-140737
DEK VISION X AXIS SERVO MOTOR(DEK X motor)133127/160704/145817 D-160704/D-145817/ D-133127
DEK Motor 157729/157731 D-157729/D-157731
DEK motor/PAPER CLEAN MOTOR 181452/157373/129352/D-181452/D-157373/D-129352
BOM CAMERA ASSY GREEN(TXT) DEK 145550 (155826 181501 181322)
BOM CAMERA ASSY GRAPHITE 2 ( TXT )DEK 181322(145550,155826,181062)
ACTUATOR LEADSCREW ASSY DEK 158472
PROCESSOR BOARD COMPLETE (INFINITY) DEK 159224
SINGLE BOARD COMPUTER ( ADVANTECH T-PCA6180E2002 ) DEK 181009 DEK 160947
386 SX, 8 MB PROCESSOR CARD DEK 140069
PROCESSOR BOARD, 486 8MB RAM 100MHz DEK 137325
DEK REAR/FRONT SQUEEGEE MOTOR 155806/155804 /D-155806/D-155804
DEK MODIFIED LEAD SCREW(ROLLER ACTUATOR) 158472/D-158472
DEK CPU CARD 159224/160992/181009/159198/160947/D-159224/D-160992/D-181009/D-159198/D-160947
PC CONTROLLER ICL ROHS COMPLIANT (TXT) DEK DEK191022/191543
DEK TORQUE AMP ASSEMBLY BOM ( TXT ) DEK 153073
EUROAMP 10 CARD UL DEK 114025
DEK CARD EXPANSION FIREWIRE UNIBRAIN ( TXT ) DEK 191015/D-191015
PC  SPARE PSU  IBUS PC DEK 190722
DEK I DEK 190696/D-190696
BOM  BOARDSTOP KIT LIP SEAL DEK 183961
CYLINDER 4 STROKE 20 BORE ( TXT ) DEK 165675
BOM  BOARDSTOP KIT LIP SEAL DEK 193377
MODIFIED CYLINDER (FROM 107460) DEK 107850
ASSY BOARD CLAMPS QUICK RELEASE 250 MM ( TXT ) DEK 178031
FOIL /SHIM, 520 MM QF B/CLAMP ( TXT ) DEK 5157438/ 137516
FOIL & SHIM, 340 MM QF B/ CLMP ( TXT ) DEK 177061
BOARD CLAMP ( TXT ) DEK 119203
CARRIER BOARD CLAMP TRANSPORT RAILS 500 DEK 158815
BOM SQUEEGEE USC 520MM ( TXT) DEK265 DEK 157274/193205
BOM SQUEEGEE USC 400MM DEK265 DEK 157382/193202
BOM SQUEEGEE USC 300MM DEK265 DEK 157387/193199
BOARD STOP LINEAR BEARING, 265 DEK 113080/D-113080
BOM LOOM FIREWIRE IEEE1394 (TXT) DEK 1394 DEK 193408 / D-193408


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