CN1857041A

CN1857041A - Method and device for filling areas situated in hollows or between tracks with a viscous product on a printed circuit board and equipment using said device

Info

Publication number: CN1857041A
Application number: CNA2004800273889A
Authority: CN
Inventors: 法朗西斯·博瑞尔瑞斯; 克莱门特·凯撒; 安托尼奥·西塞罗; 奥斯瓦尔多·诺维罗
Original assignee: Novatec SA
Current assignee: Novatec SA
Priority date: 2003-07-30
Filing date: 2004-07-29
Publication date: 2006-11-01
Anticipated expiration: 2024-07-29
Also published as: FR2858255A1; CN100559916C

Abstract

The invention relates to a method and device for filling areas located in hollows (4) which do not open out onto the surface of a substrate (1) without a mask or silk screen. According to the invention, said method consists in associating the following objects according to the order of the direction of relative displacement of a head (12t) of a filling product (2) in relation to the substrate (1) i.e. a spreading element (10) for the product to be filled (2) on the surface of the substrate (1); an element for displacing (3) the filling product (2) in the area to be filled (4); an element (7) for adjusting the thickness or raking off the excess filling product (2) such that the above-mentioned filling product (2) remains constantly in contact with the area to be filled (4) from the beginning of the filling operation until raking off of the excess product.

Description

Using between the goo filling road on the printed circuit board (PCB) or the method and apparatus in recessed district

Technical field

The present invention relates to a kind of equipment, this equipment is used for by discharging with respect to the air or the gas in the recessed district on a surface and replace with a kind of viscous liquid filler, and inserts filler in this recessed district.Usually, these districts are long, narrow and dark.For example, the present invention can be applied to realizing printed circuit, such as the printed circuit that uses in automobile.In fact, such application is arranged, wherein adopted conduction road and had substrate greater than the thickness of 100 microns (normally magnitudes of 400 microns) with copper for example.In these are used, need fill the district between the road with dielectric, and this filling must not have the electrical characteristics and the thickness to obtain in recessed district to optimize of bubble.What further, the district not necessarily sealed between these roads.After this padding, described printed circuit is subjected to the processing of addition polymerization compound, is subjected to a kind of scratch brushing then and handles.

Background technology

In order to carry out this filling, those skilled in the art adopts its technology of grasping, promptly by the coating of a roller or by the silk screen printing of scraping blade.These methods comprise the be transferred thing of promotion in the place ahead of a roller or inclination scraping blade, produce one in the thing and spring up pressure so that it is filled in the recessed district to be transferred at this.The equipment of these prior aries has two kinds of problems:

-first problem is such fact, and is promptly recessed and in the district of another side sealing at some, be detained air, and it stoped filler that these are distinguished complete filling.For fear of this problem of prior art equipment, scraping blade or roller are repeatedly passed through, but the filling that is obtained still is not really gratifying, because not blocked up and always comprise some air at the filler in recessed district.Obviously, the production cycle of this multipass method does not meet the requirement of large-scale production.

-the second kind of problem is relevant with such fact, that is, filler is filled parts institute and draws again, and this might take deposit out of, when viscosity particularly big when the deposit size or filler is big.This problem is especially severe under the situation of using transferring roller.

In the past, proposed to be used to fill the equipment in the hole that gets clogged.Patent application PCT/FR00/03494 number of same applicant's submission is an example.This technology is included in and moves two seams on the surface of the substrate that will fill.First seam is coupled with a vacuum generator, and second seam comprises filler.First seam simultaneously with the outside at a distance of and apart from the distance of second seam greater than suprabasil maximum open, and this distance is along the orientation measurement parallel with direction of displacement.In the case, this equipment is inevitable carries out leak free the contact with substrate.Otherwise, just can not realize the filling of blind bore fully.This technology only is applicable to the chamber of obstruction, and the periphery on the filling surface in this chamber is being represented a closed area.Further, in the large-sized substrate that has surface imperfection, be to be difficult to very much obtain and keep vacuum.

Screen printing apparatus is arranged, and its permission is filled the through hole in the substrate with pastel by the silk screen printing mask.Therefore, United States Patent (USP) the 6633162nd has been described such equipment, wherein adopted the live-rollers of translation on mask, with according to of the motion of this equipment with respect to substrate, be applied to the pressure that springs up on the brazing cream in the place ahead of roller, with by from the lower surface air-out of substrate and this hole is filled.A shortcoming of this equipment is that the filler that roller shifted is drawn again by the rear portion of roller institute.In the described occasion of this patent, because the existence of printing block, little hole dimension and the rheological characteristic of brazing cream, the rear portion of roller is limited to drawing again of cream and can the quality of filling not be worked the mischief.By contrast, this technology is not suitable for the liquid object of pasty state is filled in recessed district opposite side sealing, that may extend long length, promptly, this recessed district have several millimeters even several centimetres or decimeter, and may have aspect ratio less than one (being defined as distinguishing) with respect to the degree of depth on surface minimum dimension divided by the hole.In fact, in the case, the rear portion institute that filler is exposed to the roller of surrounding air on the one hand draws again, and its scraping blade institute of being tilted draws again on the other hand.Further, this invention is not suitable for the recessed district of sealing, because any means that the gas in the recessed district is discharged are not provided.

It should be noted, work independently then mutually with the scraping blade that is positioned at the back at this patent central roll.At first, roller is added to respect to the relative motion that is held fixing substrate and a pressure according to this equipment and is on the anterior filler.Subsequently, the scraping blade of inclination is added to respect to the relative motion that is held fixing substrate and one second pressure according to this equipment and is on the anterior filler, and this has bubble that keeps in the groove and the consequence of extracting deposit.

United States Patent (USP) the 3921521st has been described the equipment of the silk screen printing of carrying out China ink on such as the substrate of carpet.In this patent, mentioned a rotating cylinder, it makes it possible to produce a hydrostatics and springs up pressure in the lower region of equipment, and it is subjected to the help of fluid dynamics effect.The purpose of this patent is to produce one to spring up pressure in transition range, thereby forces China ink to penetrate substrate by silk screen and by air is displaced through bottom and side.Therefore, this invention is applicable to mushy substrate, but be suitable for the recessed district of sealing is not filled.In fact, be not provided for the device of the air discharge in the recessed district.With this equipment the recessed district of sealing is filled, this equipment facing to recessed district and by the time can cause compression to the air in the recessed district, but definitely can't form complete, bubble-free filling.

Usually, hydrodynamic effect seemingly force be transferred thing by a silk screen printing mask to shift a kind of means known of this thing, but this means itself are to be not enough to eliminate to removing the needs of bubble and deposition thickness, and this just in time is a purpose of the present invention.

Summary of the invention

The objective of the invention is, under the situation that does not adopt silk screen or screen reticulated printing mask, with liquid state or pastel with certain viscosity, directly filling bubble-free, additional thickness is carried out in the strict position that is positioned at recessed district on printed circuit; Wherein should be recessed into recessed district or the district recessed between the road that the district is substrate with respect to the surface of substrate, and more specifically say so in the district of relative face closure, and these districts can have very long length and/or have aspect ratio smaller or equal to 1, for example are the districts between the road of copper; Described aspect ratio is defined as described district with respect to the degree of depth on the surface of the substrate minimum dimension divided by the hole.

According to the present invention, the method for carrying out the direct filling of first bubble and additional thickness with the viscosity filler between with respect to the recessed district on the surface of substrate or printed circuit or road is characterised in that it comprises:

-by mobile device, the described filler at the mobile place, district that will fill is so that replace these gas with the gas in the recessed district of form discharge of bubble and with filler;

-and, the thickness of the filler of the surface of adjusting substrate.

Before the step of the filler that moves the zone that is arranged in the district that to fill, method of the present invention also proposes, by scattering described filler on the surface of substrate, so that the gas of the outside in the district that will fill and this district is isolated, this district and the gas that makes the outside in the district that will fill is impermeable, and this filler is provided.Therefore, by in the period of the thickness of the filler on the surface of wiping excessive filler or adjusting substrate off, described district being remained on the state that thing is covered that is filled from filling beginning, thereby filler in the zone in the district that will fill moved and avoided extraneous gas to contact subsequently, and guaranteed impenetrability with all of the district that will fill.In the period that is disseminated to thickness adjusted of filler (can striking off) to all excessive fillers, the district that fill not can with contact from the gas outside this district that will fill.

According to determining filler to replace the fundamental mechanism of the process of air, method of the present invention can be divided into 3 implementation steps.

First step is included on the surface of a substrate and scatters filler, and the mode of its distribution is to make gas in the district that will fill with outside isolated and make on the other hand that the supply of lip-deep filler of substrate is sufficient and prepare against the adjusting of filling with the thickness of possible filler on the one hand.

Second step comprises that the position in the district that will fill that is included in substrate moves described filler, thus make it possible to produce filler in the position in the district that will fill a kind of force mobile so that discharge gas with the form of bubble.Along with the carrying out that gas is discharged, the filler that corresponding space was originally scattered replaces.Filler this moves the gas caused in the recessed district and is discharged from the form of bubble, replaces thereby make this gas be filled thing.

The 3rd step comprises the desirable thickness of removing unnecessary filler or regulating the surface of substrate, and this thickness may be zero.

According to another feature of the present invention, the filler of the position in the district of filling moves by a kind of fluid dynamics effect and obtains, and preferably the fluid dynamics effect by such live-rollers obtains, that is, thus the axle of this roller is perpendicular with the direction of motion of the relative described equipment of substrate and parallel the direction of the displacement that makes tangential motion that roller locates in the district that will fill and the described relatively equipment of substrate with substrate opposite.In this way, viscosity filler adhering on roller having produced a kind of of filler by a kind of fluid dynamics effect moves.This moving increases along with the reducing of distance of distance roller.In the surface of roller, the speed of filler equals the tangential velocity of roller.It is along with the increase of the distance of roller and reduce.This rheological characteristic that reduces to depend on filler.In a word, roller is set at apart from the enough little distance of substrate, thereby the fluid dynamics effect is become significantly, for example makes in the speed of the position in the district that will fill filler more than or equal to 50% of the tangential velocity of roller.Preferably, should avoid contacting of roller and substrate,, avoid interference this fluid dynamics effect on the other hand so that eliminate the danger of mechanical friction on the one hand.

According to the present invention, be closed and may be the filling in very long recessed district in the opposite one side of substrate, preferably by filler and guaranteed with certain viscosity.

According to another feature of the present invention, described fill method comprises: the device that makes the substrate translation is associated with the action that promotes substrate and comprise a filling head of filler, above-mentioned filling head can be scraped the synergy of chip part and produce a positive pressure difference between the downstream of the device that is used for mobile filler and upstream by the device that is used for mobile filler and one, thereby forming one is filled the occupied limited below of thing fully and springs up the pressure area, and preferably make filler flow, thereby formed the less upstream of pressure to discharge the gas in the district that to fill along with the displacement of substrate and to replace it with filler along the direction opposite with respect to the direction of displacement of filling head with substrate at described zone position place by the formed described device that is used for mobile filler of a roller that is included in the filling head.

The rotation direction of roller makes that its tangential motion in the position in the district that will fill is opposite with the direction of displacement of substrate; On the one hand, the rotation direction of roller will make filler towards scraping chip part accumulation by the fluid dynamics effect, with roller with the downstream of roller scrape one of generation between the chip part limited spring up the pressure area; On the other hand, the rotation direction of roller produces filler from springing up pressure area flowing towards the less pressure district of the upstream that is positioned at roller in the position in the district that will fill.

Moving-member with scrape this pressure that springs up that produces in the restricted area in the downstream under the synergy of chip part, can compensate the effect of the extraction of filler and absorption again scraping chip part; This draw again to be called as pull effect.In addition, another favourable characteristic of the present invention comprises velocity of rotation and/or the diameter of regulating by this way or selecting to be used for the roller of mobile filler, promptly, regulate limited downstream and spring up the pressure difference of pressure area with respect to the less pressure district of upstream, make it possible to be controlled at the district that will fill the position scrape overflowing and compensating the above-mentioned described effect that pulls of scraping chip part of filler under the chip part, can cause the strict corresponding deposit of thickness and recessed district.

According to another characteristic of the present invention, the bubble of discharging for fear of the roller that forms moving-member is drawn in the recessed district that will fill again, a scraping blade can be set in the surface of the roller that is arranged in filling head, and preferably be provided with tangently with the top of roller.So, when roller rotates, be filled that bubble that the motion of thing draws is stopped by this scraping blade and can only owing to gas and described filler the different surfaces that rise to filler of density.In fact, scraping blade has the purpose that stops the fluid dynamics effect, to eliminate moving of filler partly.It should be noted that gas is owing to discharged naturally at the downstream of moving-member and the pressure difference between the upstream according to the direction of displacement of substrate.

According to another characteristic of the method according to this invention, moving of filler can be conditioned.For this reason, if the mobile device of filler comprises a live-rollers, the rotation direction of this roller can be independent of substrate adjusted with respect to the mode of the point-to-point speed of described equipment with a kind of.This velocity of rotation is according to the form of substrate with respect to the rheological characteristic of the speed of described equipment, filler and the recessed district that will fill, and adjusted.As previously mentioned, diameter that the fluid dynamics effect can be by changing roller and/or velocity of rotation obtain amplification in various degree.In fact, this fluid dynamics effect function that is the tangential velocity of roller.Therefore, under the constant situation of rotating speed, the increase of the diameter of roller increases the fluid dynamics effect.Equally, under the constant situation of roller diameter, the increase of velocity of rotation also makes the fluid dynamics effect increase.This a pair of parameter of velocity of rotation and roller diameter is chosen according to the rheological characteristic of filler.In fact, for example, some filler is not supported the too big excessive shear action that velocity of rotation caused.In the case, can adopt the less larger-diameter roller of velocity of rotation.For example, the roller that diameter 10mm velocity of rotation is 100 rev/mins for obtainable filler on the present market, can produce excellent filling result.Substrate or printed circuit also can obtain according to the shape in fluid dynamics effect and the district that will fill changing with respect to the velocity of displacement of pad device.For the gait of march of 30mm/s, realized very sure test.At last, the distance between the surface of roller and substrate, basically according to the rheological characteristic of filler and the degree of depth in the district that will fill, and adjusted.At this, similarly, to the thickness of present obtainable filler the distance of 0.5mm in 400 microns road, obtained very definite results.Obviously, all values that more than provide all are the examples that has provided good result, but they all can obtain bigger change under the premise of not departing from the present invention.

The invention still further relates to a kind of equipment that to implement fill method of the present invention.According to the present invention, this equipment does not adopt mask or silk screen printing screen net, this equipment is what to be used for respect to the surface, that seal on the another side of this substrate of a substrate and the recessed district that may have long length, this equipment adopts to have the liquid filler of certain viscosity and carries out translation with respect to the surface of substrate, and the remarkable part of this equipment is that it sequentially comprises along the direction of this pad device with respect to the displacement of described substrate:

-be used for scattering a dispersion member of filler in the surface of substrate,

-be used for a moving-member at the filler of the position in the district that will fill, preferably constitute by a live-rollers,

-be used to regulate thickness or wipe parts of excessive filler off,

Thereby make above-mentioned filler from fill beginning to excessive filler strike off during in keep with the district that will fill continue contact.

By designing this equipment with the moving-member symmetrical manner with respect to filler, this equipment can in two directions move and can implement on a silk screen machine.Therefore, moving of filler can be reversed according to the direct of travel of described equipment with respect to substrate.

From accompanying drawing and following explanation to them, it is more apparent that other characteristic and advantage will become.These accompanying drawings have been represented the embodiment of indefiniteness of the present invention.

Description of drawings

Fig. 1 has shown the cutaway view according to pad device of the present invention.

Fig. 2 has schematically shown the translating device that the pad device with Fig. 1 interrelates.

Fig. 3 has shown the substrate filling of carrying out according to the present invention in the mode of cutaway view.

Fig. 4 has shown the photo of the substrate that will fill in the mode of top view.

Fig. 5 has shown the amplification details of the substrate that will fill.

Fig. 6 has shown a filling head of the scraping blade that moving-member is housed.

Fig. 7,8,9 and 10 is stereograms, has shown the different phase of a kind of execution mode of an equipment relevant with the pad device of Fig. 1.

Figure 11 a, 11b and 11c are respectively the facing of a full implementation mode, side-looking and the top views of the equipment of Fig. 7.

Embodiment

Fig. 1 and 2 illustrates to have shown in the mode of cutaway view:

-one filling head 12,

-and, thereby be used to make substrate 1 translation to make can below above-mentioned filling head 12, advance the continuously device 11 of (arrow A) of substrate 1; Constitute by a printed circuit in this substrate 1.

Though filling head 12 can obtain by move filling head 12 when substrate 1 is maintained fixed with respect to the relative translation campaign of substrate 1, but also can obtain, and back kind mode is owing to easier enforcement has obtained employing by keeping the fixing and mobile substrate 1 of filling head 12.

The filling head of realizing according to the mode that is consistent with main setting of the present invention 12 comprises:

-comprise a chamber 13 of filler 2; Chamber 13 is defined by a scraping blade 7 that has smaller or equal to 90 ° inclined angle alpha in the downstream, and the scraping blade 10 that tilts along same direction by in the upstream, have more than or equal to 90 ° angle of inclination beta is defined

-and, a roller 3, it is used for moving the filler 2 be placed between

scraping blade

7 and 10 and rotates along such mode, that is, make roller 3 opposite with respect to the direction of the translational motion A of filling head 12 with substrate 1 in the tangential motion of the position in the recessed district 4 that will fill.

The rotation R of roller 3 has caused in the district 4 that will fill that the filler 2 at 4 places, time zone is moved under by roller 3; The rotation direction B of roller 3 is opposite with respect to the moving direction A of filling head 12 with substrate 1.Roller 3 and the synergy of scraping chip part 7 produce at roller 3 and scrape the limited pressure area C that springs up in a downstream in the filler 2 between the chip part 7.In fact, roller 3 produces a kind of fluid dynamics effect and filler 2 is pushed scrape to chip part 7, are walls that have less than 90 ° inclined angle alpha and scrape chip part 7, and inclined angle alpha is the angle between substrate 1 and the wall of scraping chip part 7.Will note especially, be to realize scraping operation by the wall 7 that tilts, and the inclination angle of inclined wall 7 can be used as the rheological characteristic of filler 2 and substrate 1 function of speed with respect to the A that advances of filling head 12.Therefore, angle [alpha] is more little, roller 3 and scrape among the restricted area C between the chip part to spring up pressure big more.The choosing of angle [alpha] of chip part 7 scraped in the downstream of unnecessary filler 2, also is to draw or pull effect again in order to be limited in the above-mentioned filler of scraping the rear portion of chip part 7.

Its result, when the air 5 in the recessed district 4 when moving or being discharged from the form of bubble 6, these air are filled thing 2 and replace.If air is to discharge with the form of bubble 6, these air are because the downstream restricted area C of roller 3 and the pressure difference among the upstream D and displaced from filler 2.Upstream components 10 makes it possible to filler 2 is included in the space 13 of sealing, and parts 10 tilt with the direction identical with components downstream 7 and with 1 one-tenth of substrate angle β greater than 90 °.Preferably, filling head 12 seals, thereby can form vacuum to a certain degree in the part of filling head 12, thereby formed vacuum pressure is promoted from the discharge of the air of district's 4 discharges that will fill.In addition, be provided with for filling head 12:

-be used for switching to another quick fixing system from a filling head 12,

-at a seal member of its underpart, when stopping or changing filling head, production flows out with the filler of avoiding being included in the filling head 12 2,

-one length adjuster, thus make its width that can adapt to substrate so that can according to printed circuit 1 to be processed width and reconfigure equipment of the present invention apace,

-or the like.

What is also needed is, make the amount of used filler 2 can occupy roller 3 fully and scrape restricted clearance between the chip part 7.This state is to guarantee that the pressurization of filler 2 is necessary.Thereby can provide a kind of equipment to keep the filler 2 of the minimum flow in the filling head 12.Therefore, preferably, be to make the filler that is filled with the minimum that the roller 3 that makes the moving-member that constitutes filler 2 covered all the time fully in the filling head 12 under motionless state.

In order to strengthen moving of filler 2, can adjust the state on the surface of roller 3, for example form the ridge that parallels with the axle of roller in the above or on roller 3, be provided with and a softness that parallels of roller or the wing of rigidity.

Fig. 2 has schematically shown guaranteed the substrate of advancing, will the fill a kind of implementation along the conveyer 11 of the displacement of direction A under filling head 12.Obviously, be that the conveyer 11 that is made of conveyer belt can be driven tube or any other allows the equipment of the advance A of circuit 1 under filling head 12 to be replaced in this demonstration.

Fig. 3 be its recessed district 4 the method according to this invention be filled the cutaway view of the substrate 1 that thing 2 filled.Therefrom as seen, the filling in district 4 is such, that is, filler 2 is blocked up slightly with respect to substrate 1.This is particularly advantageous, because can be sure of thus to fill completely and do not stay groove in the district on 4.This become possibility, be owing to scrape the limited pressure area that springs up that produces under the synergy of chip part 7 in moving-member 3 and downstream.In fact, springing up pressure C scrapes in the downstream to produce under the chip part 7 in the district 4 that will fill and a kind ofly slightly advances.This advancing compensated pulling effect and having caused strict excessive thickness in recessed district 4 of scraping blade.

In the demonstration of Fig. 4 on the photo of the substrate that will fill 1, can see that recessed district 4 forms by extending to distinguish between several centimetres road.The objective of the invention is with fully and do not have the mode of bubble to fill distinguishing 4 with dielectric filler.The difficulty of filling, be to distinguish 4 opposite one side be sealing and air thereby be trapped in some district.In order to fill these districts, the pressure that increases filler is not enough, because the air that this meeting is detained in by the recessed district 4 of compression during the filling head 12.In order to realize this filling, the present invention proposes causing flowing at the filler 2 at 4 places, district that will fill so that the air 5 in the recessed district 4 by moving or the form of bubble 6 and being drained, and replaces these air along with the carrying out of handling with filler 2.

The details that has shown the substrate 1 that will fill on the photo of Fig. 5 can see the degree of depth in the district 4 that will fill therein, and this degree of depth is about 400 microns at this.The conduction road is that copper becomes.

Fig. 6 has shown a filling head that has a scraping blade 9 with the cutaway view signal; Thereby scraping blade 9 by along the top that tangentially is arranged on roller 3 stoping the fluid dynamics effect to eliminate moving of filler 2 partly and by stopping and promote the discharge of bubble 6 on the wall of scraping blade 9 towards the surface, thereby bubble 6 is discharged from.

Substrate therein 1 is by under the situation that printed circuit constituted with thick copper layer, and the excessive thickness of filler 2 is easy to be removed during filler 2 is handled by a scratch brushing after the addition polymerization compound.

Fill method of the present invention can be carried out in automatic mode, for example, the rotation R of roller 3 is accompanied by by velocity of electrons and changes the fluid dynamics effect that driver element produced, and substrate 1 with respect to the translational motion A of filling head 12 by manually or such as the automatic driving arrangement of conveyer, assembly line or driven roller guaranteeing.

That Fig. 7 is used to show is 12 that interrelate with filling head, be used to guarantee the execution mode of an example of equipment of filling in the recessed district 4 of substrate 1.

From it as seen, this equipment comprises:

-conveyer 11, it has guaranteed the translation A of substrate 1 under filling head 12,

-of upstream that is positioned at conveyer 11 along direct of travel A presents conveyer 20, is used for the substrate 1 that will fill is carried towards the conveyer under described filling head 12 11,

-and, be positioned at the discharge conveyer 30 in the downstream of conveyer 11, be used to reclaim the substrate 1 that filling head 12 had just been filled.

According to the present invention, conveyer 11 more specifically is made of an endless band 110, this be with 110 preferably realize by stainless steel and on two

tubes

111 and 112 to be activated, in these two tubes at least one is to drive tube, and interrelates and be with 110 to be activated to keep-up pressure and to make just from receiving the substrate 1 that conveyer 20 come out at this with

pressure cylinder

120a and 120b on being arranged on 110 in the porch with 110.

The conveyer 20 of presenting of roll shape comprises by the inboard and is provided with two guide rail 21a of live-rollers and the centralizer 21 that 21b forms, and these two

guide rail

21a and 21b are provided with in the mode of width-adjustable joint and can suitably locate substrate 1 before being admitted under the filling head 12 on the conveyer 11 in substrate 1.Because conveyer 11 will be subjected to the pollution of filler 2 inevitably, be provided with a continuous cleaning device 22 of endless band 110 below with 110, this cleaning device 22 by one or several sheets constitute, these sheets formed be pressed under the conveyer 11 with the scraping blade on 110 the outer surface (having shown two

sheet

22a and 22b among this figure).This cleaning device can be replaced by a solvent applicator.

The discharge conveyer 30 of banding pattern makes that just being filled 12 substrate of being filled 1 can be directed to another processing unit.

All is simple and shown in Fig. 7,8,9 and 10 with the operation that is included in the equipment that the 2 pairs of circuit 1 of filler in the filling head 12 fill as described above.

The first step, as shown in Figure 7, circuit 1 is placed under the filling head 12, and simultaneously another circuit 1 is guided between two rail 21a of the centralizer 21 that receives

conveyer

20 and 21b.

Second step, as shown in Figure 8, the circuit 1 that has just been centered on conveyer 20 is subjected to the driving of the pressure roll 120a of

conveyer

11 and 120b and contacts with circuit 1 under being placed in filling head 12, and the circuit 1 that is placed under the filling head 12 is advanced its recessed district 4 is filled according to method of the present invention by filling head 12 along the direction of arrow A.

In the 3rd step, as shown in Figure 9, the circuit 1 that originally was positioned under the filling head 12 withdraws from from filling head 12 fully through endless band 110 under the promotion of aforementioned circuit 1, has applied filler 2 by filling head 12 thereon.

In the 4th step, as shown in figure 10, circuit 1 is transferred to the conveyer with roller 30 from conveyer 11, to be sent to another processing unit or memory cell.The filler 2 with on 110 that remains in conveyer 11 is removed and is removed by the sheet 22a and the 22b of device 22 subsequently.

Therefore, in this way, equipment according to the present invention makes circuit 1 to advance under filling head 12 in a continuous manner.In fact, because the synergy of conveyer 20 and

pressure roll

120a and 120b, circuit 1 contacts with each other during below by filling head 12.This contact can make the pollution of filler 2 pair rollers 110 be reduced to minimum.

Figure 11 a, 11b and 11c have shown a kind of complete execution mode of such equipment respectively with the form of front view, end view and top view, and have shown with the required support installation of the work of lower part and the logical construction of driver part:

-conveyer 11, its endless band 110 be centered around two

tubes

111 and 112 around, guaranteeing the translation of substrate 1 under filling head 12,

-having a conveyer of presenting of roller 20, it has two the guide rail 21a and the 21b of its centralizer 21, and it is positioned at conveyer 11 along the upstream of direct of travel A and the conveyer 11 of substrate 1 guiding that will fill to filling head 12 belows,

-and, having the discharge conveyer 30 of live-rollers, it is positioned at the downstream of conveyer 11 and is used to reclaim and just has been filled 12 substrate of being filled 1.

It should be noted, but upstream and downstream is presented

conveyer

20 and 30 positions with respect to central conveyor 11 are manual adjustments.

Claims

1. be used for viscosity filler (2) and directly fill and cover method in bubble-free mode, it is characterized in that this method comprises with respect to district or recessed district (4) between the road on the surface of a substrate or printed circuit (1):

Move by a kind of mobile device (3) and to be in the filler (2) that the district (4) that will fill locates, so that the gas in the female district (4) is replaced these gas with the form discharge of bubble and with filler (2),

And, be adjusted in the thickness of filler (2) of the surface of substrate (1).

2. according to the fill method of claim 1, it is characterized in that this method comprises following sequential step:

By on the surface of substrate (1), scattering described filler (2) so that the district that will fill (4) with to distinguish (4) gas in addition isolated and described filler (2) is provided, make the gas outside the described district that will fill (4) can't enter described district (4),

Move filler (2) at the described place, district that will fill, so that with the gas in the district that will fill (4) of form discharge under described filler (2) of bubble (6),

Replace the gas (5) of discharging with described filler (2) with the form of bubble (6),

And, be adjusted in the thickness of the filler (2) of the surface of substrate.

3. according to the method for claim 1, it is characterized in that the mobile of locating in the district that will fill (4) of described filler (2) obtained by a kind of fluid dynamics effect.

4. according to the method for claim 1, it is characterized in that this method comprises:

Stop the bubble (6) of discharging by squeegee devices (9), thereby they are not drawn in the district (4) that will fill again by the mobile device (3) of filler (2).

5. according to the method for claim 1, it is characterized in that the described district that will fill (4) be on the another side of substrate (1), be closed and have long length.

6. according to the method for claim 1, it is characterized in that the moving movement of filler (2) is adjustable.

7. according to the method for claim 1, the mobile a kind of fluid dynamics effect by a live-rollers (3) that it is characterized in that the filler (2) located in the district that will fill (4) obtains, the axle of this live-rollers (3) and substrate are perpendicular and parallel with substrate with respect to the direction of motion of equipment, and according to the opposite direction of direction of displacement that makes tangential motion that described roller is located in the described district that will fill with substrate (1).

8. according to the method for claim 1, it is characterized in that it makes a gearshift (11) that is used for translation substrate (1) and be positioned at that substrate (1) is gone up and to comprise the filling head (12) of filler (2) relevant, above-mentioned filling head 12 (12) makes it possible to produce a positive pressure difference between the above-mentioned device (3) that is used for mobile filler (2) by the synergy that the device (3) that is used for mobile filler (2) and scrape chip part (7), thereby form and to be sprung up the pressure area by the limited downstream that described filler occupied fully, and the described device that is used for moving (3) cause the filler at the place, district that will fill along with substrate with respect to filling head (12) thus flowing of the opposite direction of direction of displacement form the less upstream (D) of pressure and also replace these gas with filler (2) with the gas (5) in the described district that will fill of discharge (4) when substrate is moved.

9. according to claim 1,7 or 8 method, it is characterized in that guaranteeing that the described roller (3) that moves of filler (2) is comprised in the above-mentioned filling head (12).

10. according to Claim 8 or 9 method, it is characterized in that the diameter of the described roller (3) that comprised in the filling head (12) and/or velocity of rotation can be subjected to regulating regulating the described limited described pressure difference that springs up the less district (D) of pressure area (C) and described pressure, thus can be controlled at that the district (4) that will fill goes out scraping advancing and compensating the above-mentioned effect that pulls of scraping chip part (7) of filler (2) under the chip part (7).

11. be used under filling pad device with respect to the recessed district (4) on the surface of substrate (1) with liquid filler material with certain viscosity without the situation of mask or silk screen, should recessed district (4) on the another side of substrate (1) be sealing and can have long length, described equipment is with respect to the surface translation of substrate (1) and be used for implementing fill method according to any one of claim 1 to 11, it is characterized in that described pad device comprises sequentially to be provided with respect to the direction of the displacement of described substrate (1) according to described pad device:

A dispersion member (10) is used for scattering filler (2) on the described surface of described substrate (1);

A moving-member (3) is used to move the filler of locating in the district that will fill (4) (2);

Regulate parts (7) for one, be used to regulate the thickness of described filler (2) or wipe excessive filler (2) off, wherein from fill beginning to excessive filler wipe off during in make described filler (2) remain on contacted state constantly with the described district that will fill (4).

12., it is characterized in that described moving-member comprises a live-rollers (3) according to the pad device of claim 11.

13., thereby it is characterized in that described equipment is can in two directions moving and implementing of symmetry on a silk screen machine according to the pad device of claim 11.

14., it is characterized in that pad device is to be maintained fixed and to make described substrate (1) to move by the pad device that makes filler (2) to realize with respect to the above-mentioned relative translation on the described surface of described substrate (1) according to the pad device of claim 11.

15., it is characterized in that it comprises according to the pad device of claim 11 or 12:

A scraping blade (9) is used to stop the bubble (6) of being discharged by above-mentioned moving-member (3).

16. any one the pad device according in the claim 11 to 15 is characterized in that it comprises:

-one filling head (12), this filling head (12) comprising:

A) chamber (13) that comprises filler (2), the downstream in described chamber (13) by define with a scraping blade (7) that tilts smaller or equal to angle [alpha] of 90 ° and the upstream side of described chamber (13) by defining with a scraping blade (10) that tilts more than or equal to an angle beta of 90 ° along same direction

B) be set at a roller (3) between described scraping blade (7) and (10), be used for moving described filler (2) and along making described roller (3) in the tangential motion at the place, district that will the fill direction rotation opposite with respect to the translational motion (arrow A) of described pad device with described substrate

-and, be used to make described substrate (1) thereby translation can be advanced described substrate continuously under described filling head (12) device (11).

17., it is characterized in that above-mentioned to be used to make the device (11) of described substrate (1) translation be conveyer belt according to the pad device of claim 11.

18., it is characterized in that described filling head (12) has a seal member that is arranged on its underpart according to the pad device of claim 16.

19. according to the pad device of claim 16, it is characterized in that described filling head (12) length can according to the width of substrate to be processed (1) and adjusted.

20. according to the pad device of claim 16, it is characterized in that described filling head (12) adapt to width and a quick fixing system of substrate to be processed (1) make it possible to switch to another filling head from a filling head.

21., it is characterized in that described roller (3) comprises the wing that parallels with the axle of described roller, to strengthen moving of described filler (2) according to the pad device of claim 16.

22. according to the pad device of claim 15 or 16, it is characterized in that described scraping blade (9) in the mode of the discharge that causes bubble (6) by along the top that tangentially is arranged on described moving-member (3).

23. any one the pad device according in the claim 12 to 22 is characterized in that described substrate (1) is a printed circuit.

24. any one the pad device according in the claim 12 to 23 is characterized in that the described filling head (12) that comprises described filler (2) seals.

25. according to any one the pad device in the claim 12 to 23, the filling head (12) that it is characterized in that comprising described filler (2) be sealing and be arranged in part on the described filler (2) at it and produced vacuum to a certain degree to promote from the discharging of the air of the district that will fill (4) discharge of substrate (1).

26. with according to any one the relevant a kind of equipment of pad device in the claim 12 to 25, it is characterized in that this equipment comprises:

Conveyer (11), it has guaranteed the translation (A) of substrate (1) under filling head (12),

One of upstream who is positioned at described conveyer (11) presents conveyer (20), is used for the substrate that will fill (1) is delivered to described conveyer (11) in described filling head (12) below,

And, be positioned at the discharge conveyer (30) in the downstream of conveyer (11), be used for reclaiming and just be filled the substrate (1) that head (12) is filled.

27. equipment according to claim 26, it is characterized in that conveyer (11) comprises the endless band (110) on two tubes (111 and 112), in these two tubes at least one is to drive tube, and described equipment be included in the described band of being arranged on of porch (110) top be used to keep-up pressure add pressure cylinder (120a and 120b), the described pressure cylinder (120a and 120b) that adds is used for being driven into band (110) under the filling head (12) from receiving substrate (1) that conveyer (20) sends.

28. equipment according to claim 26, that it is characterized in that presenting conveyer (20) and be roll shape and comprise a centralizer (21), described centralizer (21) comprises two guide rails (21a and 21b), the inboard of described two guide rails (21a and 21b) is connected live-rollers, and the spacing of described two guide rails (21a and 21b) is adjustable, thereby can carry out suitable location to described substrate (1) before the conveyer (11) below substrate (1) is received filling head (12) is gone up.

29. equipment according to claim 26, it is characterized in that described equipment comprises the continuous cleaning device (22) that is used for described endless band (110), described continuous cleaning device (22) comprises at least one sheet (22a or 22b), and this sheet (22a or 22b) is used to be pulled on the outer surface of the described band (110) under the described conveyer (11) to form scraping blade.

30., it is characterized in that described discharge conveyer (30) is that the substrate (1) of just having been filled by described filling head (12) banding pattern and feasible can be transported to another processing unit according to the equipment of claim 26.