CN1349375A

CN1349375A - Method for fixing and treating film material

Info

Publication number: CN1349375A
Application number: CN 00134403
Authority: CN
Inventors: 理查德·W.·卡彭特
Original assignee: Morton International LLC
Current assignee: Morton International LLC
Priority date: 2000-10-17
Filing date: 2000-10-17
Publication date: 2002-05-15
Anticipated expiration: 2020-10-17
Also published as: CN1279796C

Abstract

A film is fixed on rigid bearer by weak adhesive in order to be stripped from the bearer after a while, then is exposed to processing chemical preparation. Photosensitive resin is coated on surface of the film and is spreaded on peripheral area of the bearer along the border of film, then is exposured and formed to image, so the peripheral area of photosensitive resin is retained on peripheral of the bearer and expanded into the border of the film, thus to fix film effectively in belt type chemical processing when being displaied. Finally, against corrosion substance is removed to loosen the film which is stripped from adhesive pattern.

Description

Be used for fixing and handle the method for thin-film material

The present invention relates to method fixing and the processing thin-film material, this thin-film material is the embedded electronic components that is used to form multilayer board such as those.

People are interested in the miniaturization of printed circuit always.In the printed circuit board (PCB) that major part is used, circuit diagram traditional approach printing, especially photosensitive resin technology.Often provide and be soldered on the printed circuit such as subsidiary components such as electric capacity and resistance by craft or automated manner as independent component.These elements have real estate on printed circuit board (PCB), and the process that is welded on the circuit board is a difficulty or expensive.

Correspondingly, in proposed structure, install along circuit diagram by the circuit procedure such as elements such as electric capacity and/or resistance.This example of structure is at U.S. Patent number 5,079, can find in 069,5,155,655,5,161,086,5,261,153,5,347,258 and 5,466,892, merges to come reference in this instruction with each piece.Typically, most of this structures are laminated together to form multilayer board with insulating material.

Embedded circuit component comprises lead, electric capacity, and resistance and induction coil, all said elements can be produced by the mode of chemical process film.Term " thin-film material " refers to comprise monofilm such as metal forming at this, and pellicular cascade, and this lamination is the lamination such as the two-layer or multilayer that has specific electrical property, or by one deck support membrane and one or more layers lamination that has the material of specific electrical property to form.

Because this film substrate does not almost have mechanical strength, they can not stand the chiral process of conveyor type alone, thereby must be fixed on the rigid carriers.This film substrate can be fixed on the carriage by a rigid frame or along the adhesive tape of film edge.The labour intensity that mechanical frames applies and moves is bigger.Known that adhesive tape is easy to come off in the course of processing, thereby caused the damage of processed thin-film material.

The invention provides a kind of method that is used for conveyorization processing fixed film material.One rigid carriers wherein is provided, and its surface size is greater than the surface size of thin-film material, so that film can be placed on the surface of carriage, and allows the periphery of carriage expose.Adhesive is coated in bracket surface by the pattern that designs, so that be bonded at the periphery of film at least.This pattern can be only along the part of fixed film periphery or spread all over whole carriage.Adhesive select those to the viscosity of bracket surface greater than adhesive to the viscosity of film so that its bonding force to film surface is enough low so that under the situation of not damaging film, film can peel off from bonding patterns subsequently.Film is adhered on the bonding patterns.Photosensitive resin layer is coated on the whole film, so that photosensitive resin layer spreads all over the neighboring area that carriage exposes.Photosensitive resin layer is exposed under the patterned photochemical radiation, the pattern of photochemical radiation is such: so that in photosensitive resin layer development subsequently, the neighboring area of photosensitive resin remains on the neighboring area of bracket surface, and the into peripheral part of film that extends internally so that in processing subsequently fixed film effectively.Carry out the chemical process of film subsequently, carry out along conveyer belt usually.After the processing, the corrosion stability material that remains on the film is removed, thereby unclamps film from the neighboring area of residual corrosion stability material.Film peels off from bonding patterns subsequently.

Fig. 1 is the plane graph that adheres to the pellicular cascade on the rigid carriers.

Fig. 2 is the sectional elevation that adheres to the pellicular cascade on the rigid carriers, and photosensitive resin layer is coated on the film.

Fig. 3 is that structure shown in Figure 2 is being exposed under the patterned photochemical radiation and the sectional elevation after being developed.

Fig. 4 is the plane graph of structure shown in Figure 3.

Fig. 5 is the sectional elevation of structure shown in Figure 4 after the top layer of pellicular cascade is corroded.

Fig. 6 is the sectional elevation of structure shown in Figure 5 after residual material against corrosion has been removed, has shown that the circuit lamination just peels off from adhesive.

Embodiment specifies

The present invention relates to a kind of method by aggressivity chemical-treating facility film processed material, this method is not damaged film and is handled minimum.

" film " and " thin-film material " referred to herein as and comprises such as the single thin film material of metal forming or multilayer laminated.The individual layer paper tinsel can be used as thin-film material such as Copper Foil.But if be used to form printed circuit, any mechanical strength that Copper Foil had will be weakened by circuit processing; Thereby general such paper tinsel is laminated into the support membrane that is used to process.Even have support membrane, laminates still must support with rigid carriers.

Application No. 09/283,100 be taught in this together as a reference, it has told about the pellicular cascade structure that is used to form capacitor.It comprises double-layer structure and three-decker, and wherein double-layer structure is the insulating material as silicon dioxide, and this material is deposited on the metal forming, in three-decker, silicon dioxide be clipped in a metal foil layer and the metal level that is deposited between.

Application No. 09/198,954 be taught in this together as a reference, it has described the thin-film material that is used to form embedded resistance.It comprises the resistive material that is deposited over the platinum that for example scribbles silicon dioxide on the polyimide film, and is deposited over the resistive material on the metal forming.

All above-mentioned materials, and many other conceivable membrane structures all are suitable for handling with method of the present invention.

Fig. 1 describes is one and pastes film 10 on the rigid support plate 11 by bonding patterns layer 12.For ease of description, but not a kind of qualification, thin-film material can be the copper layer 14 on the polyimides supporting bracket 13.

Carriage 11 is materials of the rigid structure through selecting so that bear chemical erosion in the chiral process of film 10.The suitable material that is used for carriage 11 comprises, and is not limited to glass fibre, phenolic resins structure, glass and metallic plate.

Adhesive 12 is selected the little adhesive of viscosity, so that film 10 can be stripped from after processing.Adhesive 12 adheres to viscosity on the carriage 11 greater than the viscosity that adheres to film 10 surfaces, so that adhesive can not be bonded on the final product.The best chemically-resistant processing of adhesive is so that needn't be coated in it again on the carriage 11 when new film 10 being handled at every turn.The adhesive of suitable types used in the catalogue of 3M Post-It , and this adhesive is at U.S. Patent number 3,691, all was described in 140,4,166,152 and 4,786,696, and the instruction of each piece is merged to come reference.This adhesive can be coated with known applying method, such as spraying, and roller coat, dip-coating etc., perhaps it can be from transfer printing on the adhesive tape.As shown in Figure 1, the surface size of carriage 11 is greater than the surface size of film 10, so as 15 one-tenth in carriage 11 surface perimeter zones the fringing of film 10.Bonding patterns layer 12 extends so that the edge of fixed film along the periphery of film at least, but also can be coated in the whole surface of film 10 regions.

After film 10 was put on the adhesive, photosensitive resin layer 17 was applied to film surface, and spread over as shown in Figure 2 on the whole neighboring area 15 on carriage 11 surfaces.Photosensitive resin can be used as the liquid coating, or forms dried film by conventional method.Photosensitive resin can be a negative type, also can be positive-type, but describes according to the photosensitive resin of negative type herein.

Photosensitive resin layer 17 is exposed under the patterned photochemical radiation by the original copy (not shown), makes the part that is exposed of thing against corrosion be insoluble to imaging liquid.Original copy is such, promptly except in the photosensitive resin that develops, keeping the circuit pattern 17a, one peripheral part 17b also stays on the carriage 11 surface perimeter parts 15, and neighboring area 17b extends in the edge of film 10, to stay as the support " frame " shown in Fig. 3 and 4.

After the video picture, the copper sheet expose portion that is used to stay among the circuit diagram 14a such as the aggressive agent of iron chloride erodes from circuit diagram 14a.Residue against corrosion is removed subsequently, and the edge of circuit board 18 (Fig. 6) is released.Printed circuit 14 can be peeled off to be used for processing subsequently, such as being embedded on the multilayer board from adhesive 12 subsequently as shown in Figure 6.

The processing method that also has many present invention to be suitable for, foregoing circuit processing only are illustrations of the present invention.Of above mentioned U.S. Patent application 09/283,100, silicon dioxide can be by hydrogen fluoride or the corrosion of boron fluorspar acid solution as insulating material.Above-mentioned U.S. Patent application 09/198,954 has been described etching process, and the platinum resistance layer that wherein scribbles silicon dioxide can erode from conductive metal layer by etching process.Etching process is by the loose character of the platinum that scribbles silicon dioxide, and the corrosive agent that is used for bottom metal layer penetrates the platinum layer that scribbles silicon dioxide.Metal and the interface one that scribbles between the platinum of silicon dioxide are destroyed, and before significant corrosion took place bottom metal layer, the platinum that scribbles silicon dioxide fell from the destroyed zonal corrosion of interface.Thereby the present invention also is applicable to the formation of film capacitor and resistor and conducting channel.

Claims

1. method that is used at conveyorization processing fixed film material comprises:

One rigid carriers is provided, and its surface size is greater than the surface size of described thin-film material, so that film can be placed on the surface of described carriage, and allows the periphery of described carriage expose,

Adhesive is coated in the described surface of described carriage by the pattern of design, so that be bonded at the periphery of described film at least, described adhesive select those to the viscosity of bracket surface greater than adhesive to the viscosity of film, so that its bonding force to described film surface is enough low so that under the situation of not damaging described film, film can peel off from bonding patterns subsequently

Film is adhered on the bonding patterns,

Photosensitive resin layer is coated on the whole described film, so that photosensitive resin layer spreads on the neighboring area that carriage exposes,

Photosensitive resin layer is exposed under the patterned photochemical radiation, the pattern of described photochemical radiation layer is such: so that in development subsequently, the neighboring area of described photosensitive resin remains on the described neighboring area of described bracket surface, and the peripheral part of the described film that extended internally, so that in processing subsequently, fix described film effectively.

2. method of handling film, it comprises the method fixed film on carriage with claim 1, the described film that is fixed on the carriage is exposed to handles among the chemicals, remove thing against corrosion so that unclamp film from the described film that is fixed on the carriage, subsequently stripping film from the adhesive from the neighboring area of described photosensitive resin.

3. the method for claim 1 is characterized in that photosensitive resin is a negative type.

4. the method for claim 1 is characterized in that photosensitive resin is a positive-type.

5. the method for claim 1 is characterized in that described film is an electric conducting material.

6. the method for claim 1 is characterized in that described film is a resistive material.

7. the method for claim 1 is characterized in that described film is an insulating material.

8. the method for claim 1 is characterized in that described film is a laminated product, and this laminated product comprises a support film and the layer of one deck with the electrical characteristics that require at least.

9. the method for claim 1 is characterized in that described film is a laminated product, and this laminated product comprises the two-layer at least layer with the electrical characteristics that require.

10. method as claimed in claim 2 is characterized in that the corrosion of the anti-described processing chemicals of described carriage.