Fiber-optic laser: The laser small treatment of metallic film

Already a few kinds of laser can be used at cut, stiletto, solder, and the face that changes relatively thick metal, these technologies are used extensively at all sorts of industry, included a car, shipbuilding, and industry of medical apparatus and instruments. However, a lot of burgeoning recently application respects ask to use very thin metal film to undertake laser beam machining, and ask very high definition and bright and clean brim. In last few years, people put forward a lot of at the new laser technology of laser small treatment using. These laser have very good mode quality to reach but focusing sex, these two elements are very important for very small to obtaining feature size and very bright and clean brim. In this research, we compared the result that the low power laser that uses a few kinds of different types gets, these laser wavelengh included 355 Nm, 532 Nm, 1064 Nm and 1.

M of 085 μ . The article basically pays close attention to will different ply the metallic film cut of complex form becomes many parts. Although the advantage of laser uses the technology that machines a metal to a lot of differ, but they have a few drawback, when be being compared with laser photograph especially, be such more. For instance, you can use EDM (electric spark is machined) come very effective treatment metal, but this process is occurring to restrict on the smallest characteristic size in treatment object. In addition, compare with laser photograph, EDM jumps over small electrode to jump over costly and easier breakdown, change often more raised pay. Etch the technology also is used at machining a metal, these technologies are likely below certain circumstance very economy, but method of this kind of treatment also is having a few serious flaw. Above all, etch the treatment working procedure that treatment needs a lot of steps, and laser beam machining requires one step only achievable. Next, people must be handled etch a few caustic chemical goods that the technology brings about and toxic waste. Finally, aspect ratio confine is 1:1, can appear even below this kind of circumstance undercut action is cone-shaped perhaps sidewall. Meanwhile, mechanical stiletto perhaps engraves confine of groovy feature diameter to be in M of 250 μ . Although the broach of M of 100 μ sells, but these broach not only the price costly and service life is brief. Use laser will became metallic cut different figure and style to bring a lot of convenience. After using laser, need to consider broach damaged and tool tatty issue no longer. In addition, use laser technology to be opposite accessible many the limitation of aperture diameter and diagnostic dimension is small. Laser technology also makes be in angular spend or bent surface bore becomes a possibility, and no matter material is horniness soft still qualitative all applicable. Additional, of laser equipment but process designing character also makes in very the high speed inside short period time finishs thousands of this kind high speed stiletto and convention application to become a possibility. In this research, we evaluated a lot of filmy metals that machine hard, included copper (Cu) , cupreous Beryllium alloy (BeCu) , phosphorous bronze (Pbronze) , molybdenum (Mo) , stainless steel (SS) , nickel (Ni) , aluminous (Al) , titanium (Ti) , temper steel (TS) , and the oxidation indium stannum that has metallic quality (ITO) layer (be in soft with hard data base piece on) the thin overburden with other metal. The mainstream treatment that asking bright and clean brim and diagnostic size are small and respect of application of ab extra treatment are using afore-mentioned metal at present. The metallic film with very thin ply is times more current get attention. As the decrescent with ceaseless circuit and more compositive, the ply with conductor also is in dielectric to attenuate ceaselessly. There is some of very interesting application in these respects, among them one of mix very thin (it is hundreds of normally dust) conductor material is concerned, for example Cu, au, ag, with ITO. These metals show very interesting character below filmy configuration, they get when the action of laser, its expression and they have a bit in the reaction below lump different. For instance, ablation " thick " when the metal (ply is more than 1 micron about) the J/cm2 amount level that the energy density of need reachs a few in a few, and same metal uses 1 J/cm2 only below filmy configuration a few with respect to enough from base piece on come off this metal. These film are used at a lot of products, be like, touch screen, flat shows, plane cockpit, and medical apparatus and instruments, this is a few example only, and more application still are studying development is medium. In every example, the laser that we used low power (be less than 100 W, it is far below major case be less than this value) . Accordingly, we restrict metallic ply in be less than 20 close ear (500 micron) . In research, we use firm of be concerned with (California, santa Clara) Avia 355nm, the laser of 3W, photonics Industries company (new York city, bohemia) 532nm, the laser of 7W, spectral physics company (California, mountain View) 1064nm, the laser of 3W. In research, we did not use CO2 laser or accurate element laser. Because be opposite,this is for the metal that we study, CO2 laser produced reflection, and of accurate element laser commercialize degree to still can't satisfy this kind of job. We still were used 1.

085 small metric wave are long, the fiber-optic laser of 100W had a few tests and discuss to undertaking as a result. The solid state laser of diode pump riverside is worn from time to tome in short wavelengh quality of good beam of light, can be become by focusing 20 micron or smaller facula. Many the diagnostic size that because this compares us,wants research in the experiment is small, accordingly we need for many times to undertake stiletto perhaps engraves groove. We guide DXF file optics machines software and add laser parameter. Such, we got one keeps the treatment file that has treatment news somewhat, this facilitates consult and use in the future. What need points out is, all pictures that add here (besides special a piece when point out) , namely the photograph of high resolution is those who use 40 times microscope is stereo take a picture equipment films directly after laser beam machining is finished, not after classics treatment clean. Accordingly, the picture that gives out here can consider as " the poorest " circumstance. In addition, all figure use galvanometric scanning beam of light to get, did not use auxiliary gas. Graph 1a: 355nm laser pursues in the cut on the copper with 125 μ thick M 1b: 532nm laser pursues in the cut on the copper with 125 μ thick M 2a: 355nm laser pursues in the cut on the beryllium copper alloy with 150 μ thick M 2b: 532nm laser pursues in the cut on the beryllium copper alloy with 150 μ thick M 3a: 355nm laser pursues in the cut on the molybdenum with 50 μ thick M 3b: 532nm laser pursues in the cut on the molybdenum with 50 μ thick M 4a: 355nm laser pursues in the cut on the stainless steel with 100 μ thick M 4b: 532nm laser pursues in the cut on the stainless steel with 100 μ thick M 5a: 355nm laser pursues in the cut on the temper steel with 125 μ thick M 5b: 532nm laser pursues in the cut on the temper steel with 125 μ thick M 6a: 355nm laser pursues in the cut on the nickel with 330 μ thick M 6b: 532nm laser we gave out here the result of a few laser beam machining, included the contrast of two kinds of different laser among them: 355 Nm laser (all graph A) with 532 Nm (all graph B) . Graph 1 gave out a typical cut, it uses these two kinds of laser to come cut the copper of 125 micron ply; In all circumstances, cut all is in about 75 arrive inside 85 micron limits. Although the cut result of two kinds of laser is very right, but 532nm laser coupling is gotten first-rate, and compare with the result photograph of 355nm laser, faster and handling time is more bright and clean. 355nm laser suits to be used in printed circuit board treatment respect, what be inferior to 355nm because of the coupling of 532nm laser and dielectric is ultraviolet laser is good. Graph 2 gave out action of similar two bundles of laser is on the cupreous Beryllium alloy with 150 thick micron. The result of these results and copper undertook very good contrast (the result of phosphorous bronze also is such, did not give out here) . These metallic copper and all metallic alloy with coupling of two kinds of laser very good. What we need to point out here is, we are used 1.

The fiber-optic laser of 085 micron cannot receive bright and clean treatment of copper, because be in,this is 1.

The reflectivity when 085 micron wavelengh is too big. Graph 3 gave out the pattern with Laser Cutting similar molybdenum. The coupling of 532nm laser and molybdenum is inferior to the coupling of it and copper, although this is planted,laser still can be used. these results and the stainless steel with 100 thick micron (graph 4) , temper steel (graph 5) , nickel (graph 6) the result undertakes contrast. Here needs to point out, aluminium is answered to 532nm laser is not very good, and 355nm laser can be in the aluminium with 300 thick micron board the cut with aspirant very good travel (graph 7) . As quite, graph 8 gave out the cut like graph 6a, use 355nmLaser Cutting nickel namely, but graph 8 in we still were used fall in weak acerbity condition, after undertaking laser beam machining with ultrasonic clean, this gave out a very bright and clean end item. Graph 9 gave out the design that the molybdenum with 355nmLaser Cutting125 thick micron gets. In the graph " arm " outspread arrange 25 millimeter place what give out in the graph below. Have only as a result of cut mouth nominal heat, we are accordingly rough without what see the face, and this kind of phenomenon is being used a lot of " hot " it is very common when laser. Graph 7: 355nm laser pursues in the cut on the aluminium with 300 μ thick M 8: The result that graph 6a place shows sample to pass ultrasonic cleanness pursues 9: Laser we also observed the cut pointing to shape on molybdenum to use 1.

The effect of the fiber-optic laser of 5 micron. We use it to cannot engrave corrode any cupreous radical metals. However, to other metal, be like stainless steel, temper steel, and nickel, its treatment rate is rapid (opposite) , quarter corrode quality is good, the result is very satisfactory. We notice here, lab equipment lays at basic requirement, so we used a fixed beam of light to transmit a system, the gas that used height is auxiliary. We also studied 13ps, the use effect of 1064nm laser. We discover cut quality is exceedingly good, although we did not undertake this kind of laser test and verify to other metal further, but can believe, this kind of laser general is effective to the material inside quite big range. What graph 10a gives out is the figure that uses stainless steel of fiber-optic laser cut, what graph 10b gives out is the cut that uses the 25 micron that leather second laser produces on stainless steel. The result that notices fiber-optic laser and other result photographs are compared not quite even, but because set the account of brash generation artificially,this is, not be the blemish as a result of laser illuminant itself. Graph 10a: 1.

Fiber-optic laser of 085 μ M pursues in the cut on the stainless steel with 100 μ thick M 10b: Laser of 1064nm skin second pursues in the cut on stainless steel 11: Plastic go up the compound draft of golden plated film is final, graph the complex design of the 11 gold that gave out to engrave corrode gush plating to go up in polyester film. Use laser we are OK very easy and clean very will complex and concentrated design film comes off, use 355nm or 532nm laser depends on base piece and the diagnostic dimension of the requirement. It is OK to be based on galvanometric beam of light to transmit make transmit more simple and make accuracy reachs the 10 volume level to 20 micron (transmission accuracy of fixed beam of light can achieve micron to measure level, but processing speed is slower) . Our gotten verdict is below conclusion: The attune of 355nm behaved very good treatment function in all metals that Q laser checks in us, diagnostic size is small (the dot is apart from for 25 micron) . Any ply are thin all can undertake at the metal of 125 micron fast and bright and clean treatment. In 5 to 10 close ear (250 micron) its machine thick metal the result is very bright and clean, but the treatment of lump body may be compared slow. There still may be nearly 20 close sides in treatment (500 micron) thick metal, these treatment speed can be reduced. And the metal that is more than 20 close ear does not suit laser of the Q that use air to undertake machining. We think this conclusion is right at present spendable is like 10W there perhaps won't be very big change for the laser of 15W. The laser of 532nm gives out as much on a lot of metals very good result, be opposite especially coppery metal. Because its wavelengh is longer, so given to optical equipment, the size of the smallest facula that it can reach wants than 355nm laser a few bigger. These laser can achieve 15W with limits, its M2 value is lesser (also bigger laser can be used, but M2 cost also rose) , these laser compare 355nm laser buy and run cost to want low. 532nm and 355nm laser are in from all sorts of differring base piece on come off filmy respect shows very good character. Can use 532nm laser to cross transparent base piece like glass. Although 355nm laser is in base piece to ultraviolet light absorption circumstance falls, also can come off the overburden of end face, and right base piece attaint criterion very few or have hardly. Leather second laser also is worth to pay close attention to, it provided very bright and clean treatment result. But because its cost is at present relative costlier, make leather second laser besides fail to be used almost outside certain and special situation. In a word, fiber-optic laser is metallic treatment it seems that another can use program, bright and clean and its Laser Cutting is rapid, to a few millimeter thick even metal also is such. Inherent frequency cannot apply at containing cupreous metal, but later the development of duple frequency and technology of 3 times frequency may make these laser applicable to all metals. All authors all participated in American New Hampshire, the laser of the PhotoMachining company of Pelham city uses research, the author offers photograph of leather second laser to thanks to Chuck Ratermann, the William Shiner that uses a lab to IPG Photonics especially and Vijay Kancharla offer the use of fiber-optic laser to thanks for the author. CNC Milling