Technical Paper PCB PCB PCB PCB PCB PCB TG52

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1 14 Technical Paper TG5 Abstract: With the development of industry research on drilling the printed circuit board in the world has intensified which includes drilling forces hole quality drill design wear and breakage of drill positional accuracy and dynamic performance of machine tool. The drilling is a complex hole forming operation due to meso scale non-homogeneous and anisotropic nature of workpiece various failures of drills and special hole quality assessment. The key theoretical issues includes material removal mechanism drill failure mechanism surface-process modeling and quality control process optimization drill designing and manufacturing. Key words: Micro hole; drilling; 1.0 ( Printed Circuit Board) IC [1] ( 1 ) ( ) CNC -6 ( ) 0.3 mm 0.1mm 80% CO 0.1 mm 1:4 65% 0.3mm 0. mm-0.5 mm 50% 0.15mm 14% Journal of the HKPCA / 015 / Summer / Issue No. 56

2 Technical Paper IC ( ) IC ( ) [] * (U ) mm mm 300 K rpm 0.1mm-0.mm 0.03mm ( 1) WEEE ( ) RoHS ( ) RoHS O Tg ( ) 135~145 C DICY O Tg150 C (HDI) (FPC) IC (BGA CSP) 0.mm ( ) mm-0.7mm 0.005mm-0.035mm ( ) 0.018mm-0.035mm ( ) /cm /cm /cm /cm /cm /cm [3]

3 16 Technical Paper. 0.mm (0.01mm-1mm) mm 3 CAF (CAF ) CAF.3 WC Co ( ) ( ) ( ) ( 0.3 mm 0.15mm 0.05 mm 3 [4] Journal of the HKPCA / 015 / Summer / Issue No. 56

4 Technical Paper 17 ) ) ( ) ( Chyan ( ) [6][7][8] [9] (000) CAD ( 0.4mm 15K rpm) (006) ( 0.3~0.5 mm) Union Tool [10] mm ( ) ( ) Lin C Kang S K Ehmann K F Chyan H C Kang (1993) ( 0.015mm) ( 0.15mm) ( 0.30mm) ( ) ( 0.30mm) ( 0.8mm) ( 0.mm) ( ) ( 0.10mm) Union Tool ( ) 0.05mm 6.35mm 500m/s r/min Tungaloy ( ö0.3~0.5mm) XF1 ö90nm ö0.05-ö0.mm 0.1mm Co WC-Co Su (000) [11] 10 ( 4) [5]

5 18 Technical Paper [1] (TiC) (TiN) 0.3mm 4 CrC 0.3mm 4 [13] MoS -Cr 0.3mm 6.8m/min 100K RPM [14][15][16] TiN/AlN 0.3mm m/min 100K RPM -4 [17] Ti N-Wx% 0.3mm 5 [18] CrN-Wx% 0.3mm [19][0] [1] 0.8 mm 0.4mm1.0mm ;33K-66K RPM Ti/TiN/TiCN/DLC 0.4mm.5 CrAlTiN 0.3mm 4 0.3mm 3.5 [34][35] ( ) 3.4 XY [] [3] (1997 ) FEM Hinds (000 ) 0.5mm Gong ( ) ANSYS (006 ) (006 ) CAD 3D 1mm 40 K rpm 0.7mm 0.5mm 0.34 mm [4] [5] [6][7][8] [9] [31] [3] Yang (004 ) [30] (00 ) 0.1Ncm [33] Z 60m/min XY 0.005mm/ 0.005mm 1m/min ± 0.018mm 160K rpm IC 350K rpm 50K rpm 70K rpm ( Hitachi ND6Q10 Astron UB60-VII IDCT LP series) Man (1999) [36] [37][38] Huang (004) (004) ( 005) [3][39] (005) Journal of the HKPCA / 015 / Summer / Issue No. 56

6 Technical Paper 19 Timoshenko - [41] [43][44] [40] Pei (006) 150Krpm [4] ( Westwind Pluritec Excellon ) ) ( ) ( ) ( ) ( 4.1 (6 ) ( 160K RPM) ( 10m/min) ( 0.5mm )

7 0 Technical Paper mm [1] Yoshikawa E Fujiwara N Kawai H. New Entry Board for Printed Circuit Board Drilling [J].Kobe Steel Engineering Reports 005(): [] [EB/OL]. [3]. [D]. 004 [4] Kobayashi S Torigoe K. ö 50µ m Mechanical Drilling[EB/OL]. [5] PWB [EB/OL]. co.jp/tech-0.html. [6] Chyan H C. Curved helical drill technology for micro-hole drilling[d]. Northwestern University1997 [7] Chyan H C. Development of curved helical micro-drill point technology for micro-hole drilling[j]. Mechatronics 19988(4): [8] Chyan H C Ehmann K F. Curved helical drill points for microhole drilling[j]. Proceedings of the Institution of Mechanical Engineers -- Part B -- Engineering Manufacture 00 16(1): [9]. CAD [J] (11): [10]. [J]. 006(5): [11] Su J C Huang C K Tarng Y S. An automated flank wear measurement of microdrills using machine vision[j]. Journal of Materials Processing Technology (1-3): [1] Su Y L Liu T H Su C T et al. Wear of CrC-coated carbide tools in dry machining[j]. Journal of Materials Processing Technology (1): [13] Kao W H. Tribological properties and high speed drilling application of MoSCr coatings[j]. Wear (5-6): [14] Yao S H Kao W H Su Y L et al. On the tribology and micro-drilling performance of TiN/AlN nanolayer coatings[j]. Materials Science and Engineering A (1-): [15] Yao S H. Evaluation of TiN/AlN nano-multilayer coatings on drills used for micro-drilling[j]. Surface and Coatings Technology (-3): [16]. / [J]. 005(3): [17] Su Y L Liu T H. Tribological properties of TiN-Wx% coatings deposited by magnetron sputtering[j].vacuum (3): [18] Su Y L Liu T H. Effects of tungsten on the microstructures and tribological properties of CrN-W_x% coatings[j]. Materials Science & Engineering A (1-): [19] [0]. [J]. 005(37): 8-11 [1] Ueng H Y Guo C T Dittrich K H. Development of a hybrid coating process for deposition of diamond-like carbon films on microdrills[j]. Surface & Coatings Technology (9): Journal of the HKPCA / 015 / Summer / Issue No. 56

8 Technical Paper 1 []. [J]. 1998(): 5-6 [3] [4] Hinds B K Treanor G M. Analysis of stresses in micro-drills using the finite element method[j]. International Journal of Machine Tools and Manufacture (10): [5] Gong Y P Ehmann F E Cheng L. Analysis of dynamic characteristics of micro-drills[j]. Journal of Materials Processing Technology (3) :16-8 [6]. [J] (8): 50-5 [7]. [J]. 006(6): [8]. [J]. 005(5): 40-4 [9]. [J] (4):65-67 [30]. [C] / paper A-001 [31] International Journal of Machine Tools and Manufacture (10): [37] Huang B W. The drilling vibration behavior of a twisted microdrill[j]. Journal of Manufacturing Science & Engineering (4): [38] Huang B W Kung H K Yao AWL.Effect of periodic drilling force on instability in a drilling process[j]. Proceedings of the Institution of Mechanical Engineers Part C: Journal of Mechanical Engineering Science 00519(8): [39]. [J]. 005(3): 6-8 [40]. [D]. 005 [41] Pei Y CTan Q C Yang Z.J.. A study of dynamic stresses in micro-drills under high-speed machining[j].international Journal of Machine Tools and Manufacture 00646(14): [4]. [J] (1): [43] Hsieh J C Chang P C Hsu L C. Scheduling of drilling operations in Printed circuit board factory[j]. Computer Industry 00344: [44]. [J]. 006(5): [3] CAD/CAM cywang@gdut.edu.cn [33] Yang Z Tan Q Shi J E. On-line monitoring of drilling torques of microdrills[j]. Proceedings of the Institution of Mechanical Engineers Part B: Journal of Engineering Manufacture 00418(1): [34]. [J]. 004(10): 0-4 [35]. [J]. 006(5):35-36 [36] Cheong M S Cho D W Ehmann K F. Identification and control for micro-drilling productivity enhancement[j]