CN101114482A

CN101114482A - Optical disk substrate, forming mold, blue-ray disk and manufacturing method thereof

Info

Publication number: CN101114482A
Application number: CNA2006101677221A
Authority: CN
Inventors: 蛯名利幸
Original assignee: Meiki Seisakusho KK
Current assignee: Meiki Seisakusho KK
Priority date: 2006-07-27
Filing date: 2006-12-19
Publication date: 2008-01-30
Anticipated expiration: 2026-12-19
Also published as: JP2008033997A; CN101114482B; JP4769654B2; TW200807409A

Abstract

The invention aims at providing an optical disk substrate and a forming die, a blue-ray disk and a manufacturing method thereof, wherein when liquid resin is coated on the optical disk substrate by a spinning covering method to cover a signal surface, the optical disk substrate without forming a bulge part on the outer peripheral end and the die for forming the optical disk substrate are used for forming the optical disk substrate; furthermore, a blue-ray disc manufactured from the disc substrate and a method for manufacturing the blue-ray disc are also provided. A spinning coating method is used to form a gradually decreasing surface with a thickness thinner toward the outer peripheral surface on the optical disk substrate with the signal surface covered by liquid resin and on the outer periphery of the signal surface side of the optical disk substrate.

Description

Optic disc base board and shaping dies and Blu-ray Disc and method for making thereof

Technical field

The present invention relates to a kind of optic disc base board, and molding die or its periphery female die seat of shaping aforementioned lights disc board, the Blu-ray Disc that uses the optic disc base board manufacturing, and aforementioned method for making that hides the signal face by the aqueous resin that uses spin coat method.

Background technology

(Blu-ray Disk: registered trademark) be optic disc base board signal face to about 1.1mm, the manufacturing of stacking about 0.1mm photic zone forms Blu-ray Disc; And, when playing, then form reading face and mounting surface at the aforementioned signal surface layer euphotic end face that changes; Aforementioned euphotic stacking be the method that hides by the aqueous resin " ultraviolet hardening resin " that utilizes spin coat method or method of pasting about thickness of slab 0.1mm film (sheet) etc.; When the former spin coat method is rotation aforementioned lights disc board, to have the ultraviolet hardening resin of viscosity to drip in optic disc base board signal face or its inboard inner peripheral surface, the ultraviolet hardening resin that will drip by centrifugal force flows toward the periphery direction and comes with extension again; And irradiation ultraviolet radiation on aforementioned ultraviolet hardening resin, so that form protective seam on the signal side.

Shown in Figure 5 is traditional mould for optical disc substrate forming 11, and with these molding die 11 shapings are Blu-ray Disc shown in Figure 6 optic disc base board d; The inner peripheral surface 12a of the periphery female die seat 12 of aforementioned molding die 11, almost linearly; Therefore the section angle between aforementioned inner peripheral surface 12a and the master mold 13 surperficial 13a also forms right angle or bigger angle (both merging being called " slightly right angle "); Therefore on the optic disc base board d by molding die 11 formed therebies,, form the summary right angle that is same as aforementioned section angle then to the border peripheral end 17 between signal face 15 sides and the outer peripheral face 16; And when being shaped, pour into molten resin in a little clearance portion 14 between periphery female die seat 12 and master mold 13 surperficial 13a, when demoulding, can form the burr 17a that raises up towards signal face 15 and right angle orientation sometimes; But the peripheral end 17 as aforementioned is the slightly optic disc base board d at right angle; especially to forming the optic disc base board d of burr 17a on the peripheral end 17; when hiding aqueous ultraviolet hardening resin protective seam 18, can near peripheral end 17, cause ultraviolet hardening resin to form height 10～20 μ m and be called protrusion 19 problems of " sliding springboard (Ski Jump) " with spin coat method.

Especially Blu-ray Disc d1, the protective seam 18 as aforementioned can form reading faces, in case near protective seam 18 peripheral ends 17, forms aforementioned as highly behind 10～20 μ m protrusions 19, the just problem that can make a difference and read; Therefore form the Blu-ray Disc d1 of protrusion 19 at aforementioned protective seam 18, then be regarded as defective products and handle; In order to address this problem, in patent documentation 1, have open by the technology of specific purpose tool with the removal protrusion; But as patent documentation 1, reject protective seam, not only can increase unnecessary engineering, also can allow the ultraviolet hardening resin removed etc. become the powder that has static and dance in the air, be attached to the other parts of CD again with instrument.

Patent documentation 1: Japanese kokai publication hei 11-86355 communique (request item 1,0024～0032, Fig. 1, Fig. 3, Fig. 5).

Summary of the invention

The objective of the invention is to, in order to address the above problem, and optic disc base board is coated with aqueous resin with spin coat method, so that when hiding the signal face, do not form the optic disc base board of protrusion and the molding optical disc substrates mould of the aforementioned lights disc board that is used to be shaped in outer circumference end; In addition, be to provide Blu-ray Disc from aforementioned optic disc base board manufacturing, and the method for making of this Blu-ray Disc.

The present invention adopts following technological means to realize:

Optic disc base board of the present invention by using spinning to cover the aqueous resin of (spin coat) method, on the optic disc base board that hides the signal face, towards the signal side periphery of optic disc base board, forms the decrescence face of thickness of slab attenuation.

Blu-ray Disc of the present invention, after the processing of implementing to be scheduled on the above-mentioned optic disc base board, allow the signal mounting rotating disc substrate behind whirligig that faces up, so that allow the aqueous resin that drips on optic disc base board form towards the mode manufacturing that the periphery direction flows.

Blu-ray Disc method for making of the present invention after the processing of implementing to be scheduled on the above-mentioned optic disc base board, allows the signal mounting rotating disc substrate behind whirligig that faces up, so that allow the aqueous resin that drips on optic disc base board flow towards the periphery direction.

Mould for optical disc substrate forming of the present invention, possess be disposed at the formed signal face of mirror board optic disc base board master mold (stamper), and interior all female die seat of supporting master mold inner peripheral portion, and the mould for optical disc substrate forming of the periphery female die seat of supporting master mold outer peripheral edges portion on, be that perimembranous forms in the periphery female die seat, thickness of slab presses solidly face, protruding end portion, makes the decrescence face teat of aforementioned lights disc board outer peripheral face attenuation towards the master mold that extends to form.

The present invention compared with prior art has following remarkable advantages and beneficial effect:

The present invention is by using spinning to cover the aqueous resin of (spin coat) method, hide the thickness of slab of the optic disc base board of signal face, be at the decrescence face that forms attenuation towards optic disc base board signal side outer peripheral face, when therefore hiding aqueous resin with spin coat method, near signal side outer circumference end, has the advantage that forms protrusion hardly because of aqueous resin.

In addition, Blu-ray Disc of the present invention is after the processing of implementing to be scheduled on request 1 optic disc base board of being put down in writing, allow the signal mounting rotating disc substrate behind whirligig that faces up, so that allow the aqueous resin that drips on optic disc base board form towards the mode manufacturing that the periphery direction flows, therefore especially near Blu-ray Disc signal side outer circumference end, has the advantage that forms protrusion hardly because of aqueous resin.

Moreover, mould for optical disc substrate forming of the present invention, possessing the formed signal face of the mirror board of being disposed at optic disc base board master mold, and interior all female die seat of supporting master mold inner peripheral portion, and on the mould for optical disc substrate forming of the periphery female die seat of supporting master mold outer peripheral edges portion, be that perimembranous forms in the periphery female die seat, thickness of slab presses solidly face towards the master mold that extends to form, protruding end portion, the decrescence face teat of aforementioned lights disc board outer peripheral face attenuation, therefore by periphery female die seat teat, directly on optic disc base board signal side periphery, allow thickness of slab form decrescence face towards the outer peripheral face attenuation, and when the optic disc base board by this mould for optical disc substrate forming formed thereby being hidden aqueous resin with spin coat method, near signal side outer circumference end, has the advantage that forms protrusion hardly because of aqueous resin.

Description of drawings

The main position sectional view of Fig. 1: one of mould for optical disc substrate forming embodiment of the present invention;

Fig. 2: be the amplification profile of Fig. 1 symbol A part.

Fig. 3: utilize spin coat method, aqueous resin is hidden in the optic disc base board of Fig. 1, mould for optical disc substrate forming formed thereby shown in Figure 2, the key diagram when making Blu-ray Disc;

Fig. 4: other implements the main position sectional view of the mould for optical disc substrate forming of kenel;

Fig. 5: conventional optical disc substrate forming mould amplification profile;

Fig. 6: by spin coat method, the key diagram when aqueous resin is hidden optic disc base board in mould for optical disc substrate forming formed thereby shown in Figure 5.

Embodiment

Below in conjunction with accompanying drawing specific embodiments of the invention are illustrated:

Describe enforcement kenel of the present invention in detail based on drawing.Fig. 1 represents one the main position of mould for optical disc substrate forming sectional view of the invention process kenel; The amplification profile of Fig. 2 presentation graphs 1 symbol A; Fig. 3 represents to utilize spin coat method that the optic disc base board of Fig. 1, mould for optical disc substrate forming formed thereby shown in Figure 2 is hidden aqueous resin, the key diagram when making Blu-ray Disc.

As shown in Figure 1, one mould for optical disc substrate forming 20 of the invention process kenel, it comprises fixed mould 21 and flexible mould 31; It is the same that fixed mould 21 is same as traditional structure, be by be installed in the fixedly template 23 that is not shown in graphic emission forming machine shaft collar by thermal insulation board 22, and be bonding on the fixedly mirror board 26 of template 23 thermal insulation boards 22 installed surfaces opposite direction face by fixing inner panel 25, fixedly template 23, be intercalated in the fixedly insertion gate (gate insert) 29 of inner panel 25 and mirror board 26 central openings, sprue bush (sprue bush) 28 and comprise the location-plate 27 of locating ring, and being intercalated in fixedly inner panel 25 and mirror board 26 peripheral end faces, the institutes such as fixedly peripheral ring 24 of template 23 constitute and be bonding on fixedly; Though this enforcement kenel is to constitute by the interior cutter 29a that inserts all holes in the gate 29, inserting gate and interior cutter also can be other member.

Flexible mould 31 comprises, by movable inner panel 33 be bonding on the mirror board 34 on movable plate 32 and movable plate 32 fixed moulds 21 sides and be equipped on mirror board 34 on fixed mould 21 mirror boards 26 be the master mold 36 of subtend face, and seize master mold 36 36a of outer peripheral edges portion on both sides by the arms and be subjected to the periphery female die seat 35 that mirror board 34 is supported, and trip inserts in movable inner panel 33 and mirror board 34 central openings, to seize master mold 36 36b of inner peripheral portion on both sides by the arms, with be subjected to interior all female die seat 38 that mirror board 34 is supported, reach the fixed sleeving (sleeve) 39 that guides interior all female die seat 38 endoporus and be bonding on movable plate 32, and be intercalated in fixed sleeving 39 endoporus, and towards the ejector that axially is free to slide (ejector) 40, and be intercalated in ejector 40 endoporus, and towards the outer cutter 41 that axially is free to slide, and be intercalated in outer cutter 41 endoporus and towards the outstanding latch 42 that axially is free to slide, and be intercalated in movable inner panel 33 and mirror board 34 peripheral end faces, and be bonding on the movable peripheral ring 43 of movable plate 32; Moreover, also can on interior all female die seat 38 or fixed sleeving 39 end faces, form the special-purpose recess of heap layer bar (stack rib) sometimes; The main member that comprises periphery female die seat 35 on the mould for optical disc substrate forming 2 then uses martensite (Martensite) to be stainless steel SUS420J2.

As shown in Figures 1 and 2, formed cavity (cavity) 37 during 31 pairs of fixed mould 21 matched moulds of flexible mould is drawn to establish by the interior perimembranous 46 of the surface 45 of the surface 44 of master mold 36, mirror board 26, periphery female die seat 35, each end face of inserting gate 29, sprue bush 28, interior all female die seat 38, fixed sleeving 29, ejector 40, outer cutter 41 and outstanding latch 42 to form; And allow and be not shown in graphic ejecting device nozzle (nozzle) and rationally contact sprue bush 28, so that from the internal path of this nozzle by sprue bush 28, penetrate and fill molten resin towards cavity 37, and by cooling curing with the shaping Blu-ray Disc with optic disc base board D (being designated hereinafter simply as " optic disc base board D ").

Optic disc base board D forms signal face 61 (Fig. 3) by the signal region 44a on master mold 36 surfaces 44; Moreover the Blu-ray Disc specification aspect of being correlated with, the track pitch of signal face 61 (track pitch) are defined as 0.32 μ m at interval; In addition, be positioned at the outer peripheral edges portion 36a surface of outer circumferential side and be positioned on the inner peripheral portion 36b surface of all sides, then form non-signal region 44b from master mold 36 signal region 44a; Moreover the part by optic disc base board D mirror board 26 surfaces 45 and insertion gate 29 end face formed therebies then forms the surface level 64 (Fig. 3) that is opposing face with signal face 61.

Periphery female die seat 35 shown in Fig. 2 amplification profile belongs to and possesses the circular member that interior perimembranous 46 and master mold press solidly portion 47; It is with circular plane that the master mold of periphery female die seat 35 presses solidly portion 47, rationally contacts or closely connect master mold 36 outer peripheral edges portion 36a surfaces, with supporting master mold 36; In the periphery female die seat 35 perimembranous 46 be by inner peripheral surface 48, and from this inner peripheral surface 48 prolong again chimeric surface 49 in fixed mould 21 sides, and the face that constitutes of aftermentioned teat 52 constituted; Inner peripheral surface 48 and chimeric surface 49 belong to identical continuous face in fact, and when finishing the aftermentioned injection compression molding, the part that forms optic disc base board D outer peripheral face 63 is exactly an inner peripheral surface 48, and the part that is subtend with fixed mould 21 mirror boards 26 outer peripheral faces 50 then is a chimeric surface 49; And the inner peripheral surface 48 of interior perimembranous 46 and chimeric surface 49, be axial (the switching direction of mould) that master mold 36 is orthogonal, approximately towards the 21 side hole enlargements of 3 ° of fixed moulds; In addition, when finishing injection compression molding, allow between chimeric surface 49 and mirror board 26 outer peripheral faces 50 to set in the mode of carrying out subtend form across 5～10 μ m gap B; Moreover, the chimeric surface 49 of this enforcement kenel and outer peripheral face 50 all formed for 2 stages by section portion, by the 2nd section of the hole enlargement end (end remote apart from cavity 37) outer peripheral face 50, then will and chimeric surface 49 between the gap be maintained at necessarily, and be provided with and be used to prevent the roller (roller) 51 that blocks.

In addition, shown in Fig. 2 amplification profile, on master mold 36 sides of perimembranous 46, then ring-type forms teat 52 in the periphery female die seat 35; Teat 52 is for master mold presses solidly the some of portion 47, is that the master molds that extend press solidly face 53, protruding end portion 54, dip plane 55 by forming along master mold 36 surfaces, the curved surface 56 that reaches the radius-of-curvature between this dip plane 55 and the aforementioned inner peripheral surface 48 is formed; And, the face that constitutes by aforementioned dip plane 55 and curved surface 56, and allow thickness of slab T towards 63 attenuation of optic disc base board D outer peripheral face, to form decrescence face 69 (Fig. 3); And teat 52 is to pass through aforementioned curved surface 56 from inner peripheral surface 48, and the smoothed dip plane 55 that is connected in is with square one-tenth standing shape in cavity 37; The aforementioned protruding end 54 section angle C of portion on the teat 52 then form 40 ° of Sharp angles; In addition, the teat 52 of this enforcement kenel, distance till from the bottom E of dip plane 55 to protruding end portion 54 distance of parallel direction (master mold 36 surfaces 44 with) overhang F then forms 0.35mm, aforementioned master mold presses solidly face 53 from bottom G to the dip plane till the 55 bottom E, and it is 0.29mm that the mould that is orthogonal with aforementioned overhang F opens and closes the direction distance H; And the length of aforementioned inner peripheral surface 48 is 0.6mm; In addition, the radius-of-curvature of aforementioned curved surface 56 is 0.4mm.

Moreover, when the overhang F of this teat 52 is maximal value, be exactly the limit positions that can form the most peripheral of optic disc base board D signal face 61 on the specification, also can imagine the outside and signal face 62 nothing but this moment; In addition, even aforementioned overhang F is a minimum value, 52 of teats are set to the scope that can bring into play effect of the present invention; Therefore, the overhang F of teat 52 of the present invention is 0.1～1.0mm, preferably 30 °～50 ° of the section angle C of protruding end portion 54; In addition, master mold presses solidly on the face 53, and preferably in 0.1～0.6mm scope, the range of curvature radius of curved surface 56 is then with 0.1～0.8mm the best for the distance from bottom G to the dip plane till the E of bottom; But thickness of slab T forms 52 of the teats of face 69 decrescence towards 63 attenuation of optic disc base board D outer peripheral face, not only can be from the dip plane 55 and curved surface 56 two sides form, also can form from any one side.

And flowability and optic disc base board D demoulding, and on aforementioned teat 52 dip plane 55 of periphery female die seat 35, curved surface 56, inner peripheral surface 48, chimeric surface 49 surfaces, executed chromium plating in order to promote permanance and molten resin; Moreover, inner peripheral surface 48 on the interior perimembranous 46 and chimeric surface 49 border J (being the position of subtend with mirror board 26 surfaces 45) belong to the most peripheral of cavity 37, being defined as 120 ± 0.3mm at diameter is that Blu-ray Disc is used on the optic disc base board D outside dimension, the size when also having set cooling molten resin and contraction; And on mould for optical disc substrate forming 20, then set cavity 37 thickness when finishing injection compression molding, and on the additive error numerical value of Blu-ray Disc with the 1.1mm of optic disc base board D defined, additional molten resin shrinks the size of (contraction after the taking-up) when cooling off.

Next will narrate relevant for the shaping of Blu-ray Disc with optic disc base board D; At first running is not shown in the movable disk of graphic emission forming machine, moves the flexible mould 31 that is installed in movable disk again, again to fixed mould 21 matched moulds to form cavity 37; Next, never be shown in the nozzle of graphic ejecting device, penetrate 360 ℃ to 395 ℃ melt polycarbonate resin to cavity 37 by sprue bush 28; This enforcement kenel can allow the peripheral end 17 on the conventional optical disc substrate D no longer form burr 17a or dwindle into the size that does not lead to problem; Its reason is, and is relevant with the molten resin in the cavity 37 of mobile M under non-visual state, and supposition is with following relevant; In other words, the molten resin of the ejaculation M that flows then as shown in Figure 2, allows cavity 37 central part flow front portions, and along the part on master mold 36 surfaces 44, then the relation because of flow impedance postpones to flow; Therefore, elder generation arrives the mobile M of molten resin of periphery female die seat 35 inner peripheral surfaces 48, then is divided into two ends as shown in Figure 2, and wherein an end is towards the past teat 52 of master mold 36 surface pressure, and 55 past reverse directions flow along the dip plane simultaneously; Press solidly gap between face 53 and master mold 36 surfaces 44 with this constriction teat 52 and master mold, 44 molten resins that flow surfacewise simultaneously then and behind the molten resins interflow of flowing along aforementioned dip plane 55, just can not enter the gap of losing power.

And, allow aforementioned flexible mould 31 locked modes that penetrate front and back be displaced into fixed mould 21 sides, to carry out injection compression molding; So that allow the signal of master mold 36 signal region 44a, well duplicated in optic disc base board D signal face 61; In addition, there is circulation respectively to cool off medium on the

mirror board

26 and 34 etc., therefore when penetrating, also cavity 37 in, cools off molten resin; And, cool off aforementioned molten resin in also cut off cast gate (gate cut).

When cutting off cast gate, be equipped on the outer cutter 41 of flexible mould 31, in the interior cutter 29a that is equipped on fixed mould 21 insertion gates 29, advance, outer cutter 41 is embedded in the interior cutter 29a; At this moment, can form burr because of the gap (clearance) between outer cutter 41 and the interior cutter 29a; But when outer cutter 41 advances, outer cutter 41 peripheries on flexible mould 31 sides, and the mounting portion 65 of the formed optic disc base board D of ejector sleeve pipe 39 end faces on, then do not form burr.

When playing with record Blu-ray Disc D1, then Fig. 3 is reversed up and down, allow signal face 61 sides 59 towards the below, with mounting in the broadcast and pen recorder of being located by mounting portion 65; And from the broadcast and pen recorder of below, the protective seam 60 by the hyacinthine laser is with reading signal face 61 etc.

On flexible mould 31, the Blu-ray Disc that sets master mold 36 formed therebies is during with optic disc base board D because the end face surface level 64 by the fixed mould formed thereby, even so the burr 66 of formation are arranged on the surface level 64, do not influence the precision of Blu-ray Disc D1 mounting portion 65 yet; On the other hand, on the fixed mould side, set the mould of master mold, then do not change the structure that only outer cutter is equipped on the flexible mould side; So on the aforementioned fixation die side, set the mould of master mold, when the shaping Blu-ray Disc is used optic disc base board, have, and in mounting portion, form the problem of burr because of outer cutter and interior cutter gap; Therefore change is not suitable for cutting off the complicated approach of cast gate or can removing the device of burr with finished machined mounting portion separately with outer cutter and interior cutter.

Next, the molten resin of finishing in the cavity 37 cuts off cast gate and cooling curing, and after finishing optic disc base board D shaping, when allowing demoulding spread all over optic disc base board D with air, with flexible mould 31 migration die sinking directions, to carry out demoulding and die sinking; At this moment, optic disc base board D is connected to flexible mould 31 sides, is not shown in to transport next engineering to after graphic taking-up robot adsorbs again; The periphery of signal face 61 sides 59 on the optic disc base board D by dip plane 55 and the curved surface 56 on periphery female die seat 35 teats 52, allows thickness of slab T towards outer peripheral face 63 attenuation, and forms decrescence face 69; Moreover the surface level 64 of aforementioned decrescence face 69 inner faces is smooth, so optic disc base board D only allows thickness of slab T side face 63 outward, and attenuation becomes decrescence face 69; The aforementioned decrescence face 69 of this enforcement kenel is made of taper (taper) face tilt face 69a and curved surface 69b; About dip plane 69a, then 61 59 in signal face is 40 ° and tilts to connect; In addition, decrescence the wide W of face 69 is the outer peripheral faces 63 from the radiation direction, forms the part of 0.35mm in the inboard; Moreover, the aforementioned dip plane on the face 69 decrescence, with 30 °～50 ° the bests that tilt, the wide W of radiation direction of face 69 decrescence is with 0.1～1.0mm the best; In addition, any part on the face 69 decrescence can be made dip plane or curved surface, also can be only be constituted by the either party of dip plane or curved surface; Moreover the circular protrusion that forms inner peripheral surface on optic disc base board D shown in Figure 3 then belongs to heap layer bar 67, and recess 68 is by interior all female die seat 38 outstanding formed annular recessed portion of pawl 38a; With this optic disc base board D that is shaped, then correct or carry out the annealing (annealing) of stabilization or vacuum evaporation etc. and on signal face 61, form the processing that reflectance coating etc. is scheduled in the warpage of subsequent implementation optic disc base board D.

Next, on the optic disc base board D signal face 61 of processing such as enforcement formation signal face 61 reflectance coatings, then use spin coat method, hide protective seam 60 by the aqueous resin of penetrability; At first, as shown in Figure 3, on whirligig 57, allow signal face 61 sides 59 up, behind mounting and the fixed light disc board D, begin to carry out low speed rotation with 50～200rpm approximately; And from forming signal face 61 inboards of reflectance coating, the nozzle 58 near non-signal face 62 tops drips aqueous ultraviolet hardening resin U; About ultraviolet hardening resin U aspect, then select suitable viscosity 50～10,000mpas; And, ultraviolet hardening resin U to be dripped on optic disc base board D, the rotation number of rotating whirligig again rises to about 800～4000rpm, to flow to peripheral direction by centrifugal force by ultraviolet hardening resin U; At this moment, on optic disc base board D signal face 61 peripheries, except possessing the decrescence face 69 of thickness of slab T towards outer peripheral face 63 attenuation, simultaneously on the border between aforementioned decrescence face 69 and the non-signal face 62, almost do not form burr, therefore almost can be near the outer circumference end of signal face 61 sides 59, the height of ultraviolet hardening resin protrusion is fixed as 3 μ m, even exists hardly; In this enforcement kenel, hide protective seam 60, then be implemented into the Outboard Sections of heap layer bar 67 by interior all side ultraviolet hardening resin U.

Moreover, the invention belongs to when making the DVD CD, be different from fully when fitting 2 optic disc base boards, by the technology of spin coat method extension ultraviolet hardening resin; With DVD, because the optic disc base board of applying is also arranged, when therefore implementing spin coat method, the problem that ultraviolet hardening resin swells takes place hardly near outer circumference end above the ultraviolet hardening resin layer; On the other hand, the present invention only hides the directly sclerosis of protective seam 60 backs by aqueous resin on optic disc base board D signal face 61 sides 59, and the smoothing of therefore keeping this protective seam 60 just seems especially important.

And, continue the rotary CD substrate D and reach 5～20 seconds with aforementioned rotation number; Thereafter, when reducing magnetic disc substrate D rotation number, by not being shown in graphic ultraviolet lamp, from optic disc base board D signal face 61 tops, by interior irradiation ultraviolet radiation outward, the protective seam 60 that allows ultraviolet hardening resin hide about thickness 0.1mm rehardens the back to produce Blu-ray Disc D1; Moreover, be used for spinning and cover the aqueous resin of (spin coat) method such as the light transmission of tool brilliance, also can use other light-hardening resin or thermosetting resin; In addition, drippage, rotation and UV cured opportunity (timing) etc. also can suitably be changed in the drippage position of aqueous resin or the coating position of interior all sides above the optic disc base board D; And protective seam 60 formed Blu-ray Disc D1, generally all have and carry out follow-up surface level printing, but the type that is accommodated in chuck according to kind is also arranged.

Next, will implement the mould for optical disc substrate forming 70 of kenel, illustrate that shaping blue light (Blu-Ray) uses optic disc base board with shown in Figure 4 other; Aforementioned molding die 70 also has by matched moulds contact rationally or near the flush type of master mold 73 with periphery female die seat 77; And, on fixed mould 71 mirror boards 72 of aforementioned molding die 70, be subjected to master mold 73 and support; Master mold 73 is to carry out vacuum attraction by the air flue 74 that is formed at mirror board 72, and is subjected to mirror board 72 and supports; On the other hand, on flexible mould 75 mirror boards 76 master mold is not installed, on its outer peripheral face 76a and the 76b, chimeric circular outer periphery female die seat 77; Periphery female die seat 77 is to be installed on aforementioned mirror board 76 or its outer circumferential side member by spring 78; In addition, set roller 79 on the mirror board 76 outer peripheral face 76b, crack between the aforementioned periphery female die seat 77 has been remained certain periphery female die seat 77, can bring into play the locomotive function that does not block mirror board 76; And, during to aforementioned fixation mould 71 matched moulds flexible moulds 75, allow the master mold of periphery female die seat 77 press solidly portion 81, contact rationally or near the surface 80 of aforementioned master mold 73 80 and 81 between the two, then forms the cavity 82 that does not enter molten resin.

And master mold 73 sides of aforementioned periphery female die seat 77 interior perimembranous 83, then form cyclic lug 84; During matched moulds, teat 84 belongs to the some that master mold presses solidly portion 81, and the curved surface 89 that is pressed solidly between face 85, protruding end portion 86, dip plane 87, this dip plane and the inner peripheral surface 88 by the master mold that extends along master mold 73 is formed; The tolerable size of these periphery female die seat 77 teats 84 shapes, the enforcement kenel shown in Fig. 1 waits before then slightly being same as; In addition, about by the optic disc base board method of mould for optical disc substrate forming 70 injection compression moldings or the method etc. of making Blu-ray Disc from optic disc base board also slightly with; But in other implements kenel, form the mounting portion of optic disc base board, formed burr countermeasure between cutter and the interior cutter outside in the time of must taking to cut off cast gate by fixed mould 71 sides.

Moreover the variation aspect that other implements the optical disc substrate forming mould 70 of kenel also can be installed on master mold the flexible mould side, and the periphery female die seat is installed on the fixed mould side, can avoid forming in mounting portion the problem of aforementioned burr this moment; In addition, even the periphery female die seat of shown types such as first Fig. 1 also can be installed master mold and periphery female die seat on the fixed mould side; In addition, no matter be the mould of any type, all can on two-sided, master mold be installed.

Moreover the present invention also comprises every change of doing based on the knowledge of being familiar with this operator, revise and result that state such as improvement is implemented; In addition, add the enforcement state of aforementioned change etc., only otherwise break away from main contents of the present invention, just all belong to the scope of the invention; Though this enforcement kenel has illustrated the Blu-ray Disc optic disc base board, also be used in the aqueous resin of coating on signal face (play special-purpose signal face, the Worm type record surface is regardless of) side, to form all CDs of protective seam; For instance, allow protective seam after finishing sclerosis on the signal face, then by 2P method or other applying method, the CD of stacking again other signal face (Blu-ray Disc that contains 2 layers of type of single face); In addition, also the two-sided signal face that is considered as of optic disc base board can be formed protective seam by aqueous resin on two-sided.Therefore, although this instructions has been described in detail the present invention with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention; And all do not break away from the technical scheme and the improvement thereof of the spirit and scope of invention, and it all should be encompassed in the middle of the claim scope of the present invention.

Claims

1. optic disc base board is characterized in that: hidden on the signal face of optic disc base board by the aqueous resin that uses spin coat method, at optic disc base board signal face periphery side face outward, form the decrescence face of thickness of slab attenuation.

2. optic disc base board according to claim 1, it is characterized in that: optic disc base board belongs to Blu-ray Disc and uses, and form the decrescence face of thickness of slab attenuation towards aforementioned outer peripheral face, and have dip plane to 30～50 ° of signal face tilts, and by the radiation direction from the inboard wide part that forms the decrescence face of 0.1～1.0mm of outer peripheral face.

3. Blu-ray Disc, it is characterized in that: after the processing that described optic disc base board enforcement is scheduled to claim 1, signal is faced upside mounting whirligig, rotate the aforementioned lights disc board again, allow the aqueous resin flow of dripping on the aforementioned lights disc board form toward the manufacturing of periphery direction.

4. Blu-ray Disc method for making, it is characterized in that: after the processing that described optic disc base board enforcement is scheduled to claim 1, signal is faced upside mounting whirligig, rotate the aforementioned lights disc board again, allow and drip aqueous resin flow on the aforementioned lights disc board toward the periphery direction.

5. mould for optical disc substrate forming, it is characterized in that: be disposed on the optic disc base board of mirror board the master mold that forms the signal face, and interior all female die seat of this master mold inner peripheral portion of supporting, and the mould for optical disc substrate forming of the periphery female die seat of this master mold outer peripheral edges portion of supporting on, possess the master mold that extends to form and press solidly face, protruding end portion, and form according to claim 1 in the interior perimembranous of periphery female die seat that the thickness of slab T of optic disc base board forms the decrescence teat of face towards the outer peripheral face attenuation.

6. mould for optical disc substrate forming according to claim 5, it is characterized in that: the protruding end portion section angle on the periphery female die seat teat is 30 °～50 °, and by the thickness of slab side face attenuation outward of optic disc base board according to claim 1 form face decrescence the dip plane, and curved surface formed.

7. mould for optical disc substrate forming according to claim 5 is characterized in that: the interior perimembranous of periphery female die seat form comprise extend master mold press solidly face, be set at 30 °～50 ° of section angles protruding end portion, and the thickness of slab of optic disc base board form the decrescence teat of face towards the outer peripheral face attenuation.