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Abab Ink jet in the PCB industry An introduction.

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Presentation on theme: "Abab Ink jet in the PCB industry An introduction."— Presentation transcript:

1 abab Ink jet in the PCB industry An introduction

2 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Inkjet: definition Inkjet: generation of images by propelling droplets of a functional material onto a substrate

3 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Inkjet: thermal propelling An ink is pumped in the pressure chamber An electrical heater generates steam The increased pressure jets a droplet from the chamber onto the substrate Cheap, slow, difficult to control well, need of aqueous inks Used in consumer printers

4 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Inkjet: piezo-electical propelling A piezoelectric crystal generates a shock wave in an ink chamber, jetting a droplet out of the chamber onto the substrate Ink is to be cured by UV light (UV inks) or by cooling down (phase shift inks) More expensive, fast, good control, wide variety of inks Used in commercial and industrial printers

5 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Inkjet: continous propelling A high pressure pump generates a constant flow of charged ink droplets. The droplets can be deflected from the substrate by a electrical field Matured technology, long traveling distance, no nozzle clogging Used in industrial printers (marking).

6 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Inkjet: functional material 1 Aqueous inks: Water, glycol and dye or pigment Dye: cheap, colors fade Pigment: long term, UV resistant Cheap, receiving layer needed on substrate 2 Solvent inks (hard and mild or eco) Volatile organic compounds (VOCs) and pigments Can print on vinyl 3 UV inks Acrylic monomers and initiator After printing ink is cured by UV-light (pinning the droplet) Can be applied on uncoated substrates, very robust image Expensive, require expensive curing module Image may crack

7 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Inkjet: substrate The right propelling technology with the right functional material can print on: Paper Paper (with micro porous layer) Wall paper Coated paper Card board Textile (canvas, T-shirts) Stone and tiles Packaging materials Plastics (vinyl) Aluminum (cans, blisters) Copper (PCB) ………

8 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Inkjet: Heads: Good to know Nozzle: Pipe, channel that directs an ink droplet Also called: droplet generation unit, propelling unit, orifice Resolution Figure indicating the number of nozzles per inch Typical: 360, 720, 1440 DPI Drop size Figure indicating the content of one droplet expressed in pL (pico liter) 1 liter = (10 12 ) pL pl weights 1 mg, Typical: 80, 40, 14, 4, 1 pL

9 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Inkjet: Heads: Good to know Dots per droplet One droplet can be formed by several dots (shots) These dots conglomerate during flight to form one droplet Typical: 1 to 8 Manufactures Brother, Cannon, Dimatix (ex Spectra) (part of Fujifilm), Epson, Konica Minolta, Kyocera, Ricoh, Toshiba-Tech, Xaar

10 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Inkjet: UV Inks: Good to know Dynamic viscosity (jetability): Resistance of a fluid to be deformed Also "thickness -water is "thin, low viscosity -honey is "thick", high viscosity. The study of viscosity is known as rheology Expressed in Pas (Pascal sec) / mPas or cPoise Typical: 5 – 15 mPas Static surface tension (line sharpness) Measurement of the capacity of a liquid to form a ball when in contact with another surface Expressed in N/m (Newton per meter) / mN/m Typical: mPas The Dynamic viscosity is varying with changing temperature

11 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Inkjet: UV Inks: Good to know Specific weight Weight per volume unit Expressed in kg/m 3 / g/cm 3 Typical: 1 – 1,25 g/cm 3 Average particel size: Size of the particles in the ink Expressed in m / nm Typical: 250 – 500 nm Latency: Time a nozzle can be idle without getting clogged

12 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Inkjet: UV Inks: Good to know Adhesion Scratch resistance Shelf life Color and color fading Dyes - pigments Price (per liter, per cassette) …. Manufactures: HP,Sun Chemicals, Cabot, Avecia, Agfa, Sericol,Taiyo, …..

13 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Inkjet: Printers: Good to know Print quality Resolution Repeatability Speed Foot print Flat bed / drum Price (purchase, operation, maintenance, … ) …. Manufactures: Agfa, Canon, First EIE, Epson, HP Kodak, Lexmark, Microcraft, Orbotech, Ricoh, Xerox, ….

14 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Inkjet: Wave form Piezoelectric.avi

15 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Inkjet: Cleaning mechanisms The primary cause of problems: when ink sedimentates, hardens or particles size grows in the print head's nozzles they get blocked (clogging) Solutions: Covering the print head nozzles with a rubber cap Suction pump A mechanism to reapply moisture to the print head. Frequent spraying and wipe print head The frequent cleaning can consume quite a bit of ink and has an impact on the cost

16 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Traditional Workflow Patterning Resist (IL & OL) Solder mask Legend print

17 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Workflow Inner Layer Traditional InkJet Provisional InkJet Final LDI & PI

18 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Workflow Outer Layer Traditional InkJet Provisional InkJet Final

19 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Workflow Solder Mask Traditional InkJet Provisional InkJet Final

20 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Workflow Legend Design Plotter film Dev & fix film Produce Screen Screen print Clean screen Design Print Traditional InkJet Final

21 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Long term Inkjet: conductors, insulators, solder mask, legend ink, hole filler, conformal coatings, optical conductor, surface finishing, solder paste, ….. reel to reel

22 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 And abab

23 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Agfa holds good cards Agfa Materials: Market leader AgX phototooling -Good in-road in the PCB industry -WW sales & application organization - WW logistical organization Agfa Graphics Strong in Ink Jet technology and inks Agfa Materials Technology Center: Top lab that creates functional fluids Agfa Material Operations World class functional fluid production facilities

24 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Printer Coatings Test platforms (multi color) INKS Your application and printing system Jetting lab (single color) Agfa Materials Technology Centre Functional fluid development

25 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Agfa Materials Technology Centre Functional fluid development Jetting performance Jetting reliability Latency Shelf life Physical Properties - adhesion - flexibility - scratch resistance - tackiness - …… Pigment dispersion Photo initiation Acrylates Wetting agent Image quality Cure speed Image permanence Compatible with: - printer components - production facility - packaging - safety & environment regulations - patent situation ….. Raw material cost Manufacturability

26 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Agfa Materials Technology Centre Functional fluid development

27 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Agfa Materials Operations

28 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Agfa Materials Operations

29 Agfa Materials: for the PCB Industry abab Eric Janssens May 2013 Inkjet & the PCB industry Inkjet technology reached a level it is applicable in the production of PCBs a competitive way with good yields ab is dedicated to transform from #1 in phototooling to # 1 in patterning


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