394 results about "Glass chip" patented technology

The invention relates to a hollow glass assembly and a preparation method thereof. The hollow glass assembly comprises a first glass sheet and a second glass sheet, the first glass sheet and the second glass sheet are oppositely arranged, a sealing cavity is formed between the first glass sheet and the second glass sheet, the first glass sheet is provided with a Low-E film layer, the Low-E film layer is provided with a first periodic hollow pattern, and the second glass sheet is provided with a second periodic hollow pattern. A heat preservation film layer is arranged on the second glass sheet, and the heat preservation film layer is provided with a second periodic hollowed-out pattern. According to the hollow glass assembly, the Low-E film layer with the first periodic hollowed-out patterns is arranged on the first glass sheet, the signal anti-reflection effect is achieved, the heat preservation film layer with the second periodic hollowed-out patterns is arranged on the second glass sheet, the signal passing ability is improved, and meanwhile the thermal performance of the hollow glass assembly is improved.

The application discloses a kind of detection pesticide water amitraz integrated organic photoelectrochemical transistor sensor construction method.The application is integrated on the same fluorine-doped tin oxide conductive glass chip by laser etching technology to have the gate, source, drain three electrodes of organic photoelectrochemical transistor.In order to improve the activity and stability of grating material, the method of encapsulating Pd NPs in Cu-MOF and pyrolyzing is adopted, and Pd NPs / p-Cu-MOF is formed.Pyrolysis Cu-MOF with three-dimensional MOF structure as active carrier can load more Pd NPs, and the redox active copper metal elements contained therein will cause electron transfer between carrier and Pd NPs, so as to adjust the electronic state of metal active site and improve its catalytic performance.Schottky junction is formed between Pd NPs and p-Cu-MOF, which promotes the separation of electrons and holes.Pd NPs / p-Cu-MOF is used as photoactive gate material, and amino amitraz aptamer with carboxyl on the material is used as recognition element, so as to realize the OPECT sensing detection of ICP.

Disclosed in the present invention are a glass sheet production method and system. The method comprises: first performing defect detection on a glass ribbon to obtain position information of each defect; then scribing a cutting contour on the glass ribbon to obtain a preliminarily cut glass sheet to be separated; further performing simulated layout on the preliminarily cut glass sheet to be separated, so as to obtain a virtual frame corresponding to a deeply cut glass sheet; once the preliminarily cut glass sheet has been separated, marking a corresponding position in a defective virtual frame on the basis of the position information of the defect; and finally cutting the separated preliminarily cut glass sheet to obtain the deeply cut glass sheet and scrapping the marked deeply cut glass sheet. During subsequent deep processing, the preliminarily cut glass sheet is cut to obtain the deeply cut glass sheet. It is only necessary to scrap a defective deeply cut glass sheet having a laser-engraved mark, rather than scrapping the entire preliminarily cut glass sheet. Therefore, the present production method can reduce the loss rate caused by glass defects and improve glass utilization rate and final production yield pass rate.

The utility model provides a display screen glass sheet code spraying jig which comprises a jig body, the surface of the jig body is provided with a plurality of placing grooves which are transversely arranged and used for placing display screen glass sheets, the plurality of placing grooves located in the same row are communicated with one another through vertically arranged sheet taking grooves, and the sheet taking grooves are also arranged on the surface of the jig body. According to the jig for code spraying of the display screen glass sheet, the jig body is machined through numerical control machining equipment, the width of the containing groove is 20 mm, the assembling precision of the containing groove and the display screen glass sheet can reach + / -0.05 mm, and the assembling precision is far higher than that of actual code spraying standard tolerance and high-precision adaptive design; according to the code spraying device, it is ensured that the glass sheet is tightly and stably matched with the containing groove, displacement of the glass sheet in the code spraying process is effectively prevented, the accuracy of the code spraying position is greatly guaranteed, and the qualified rate of products is increased.

This application relates to apparatus and methods for roll forming of high-refractive-index glass sheets. The method of forming a glass sheet includes: (a) forming a glass ribbon from molten glass using a pair of forming rollers; (b) reducing the horizontal temperature variation of the glass ribbon over 80% of its entire width before cooling to the glass transition temperature to 10°C or less; (c) controlling the cooling rate of the glass ribbon as it moves longitudinally downward in the solidification zone such that the glass ribbon has a first average cooling rate before cooling to the glass transition temperature and a second average cooling rate after cooling to the glass transition temperature, the first average cooling rate being less than the second average cooling rate; and (d) separating the glass sheet from the glass ribbon.

The utility model relates to an automatic paper changing mechanism and a glass cutting device comprising the automatic paper changing mechanism, the automatic paper changing mechanism and a cutting carrying table are correspondingly arranged, and the automatic paper changing mechanism comprises a mounting structure, a first paper changing structure and a second paper changing structure. The mounting structure comprises a first mounting plate, a second mounting plate, a third mounting plate and a fourth mounting plate. The first paper changing structure comprises a first mounting guide rod, the two ends of the first mounting guide rod are rotatably arranged on the first mounting plate and the second mounting plate, and the breathable paper tube is clamped to the first mounting guide rod. The second paper changing structure comprises a second mounting guide rod, the two ends of the second mounting guide rod are rotatably arranged on the third mounting plate and the fourth mounting plate, and the other end of the breathable paper is wound on the second mounting guide rod. According to the technical scheme, the problem that in the prior art, when glass is cut, glass chips can scratch the surface of the glass is effectively solved.

The invention relates to the field of grinding machining, in particular to an automatic glass sheet chamfering device which comprises a rack, a grinding mechanism and a driving mechanism. The glass sheets are horizontally stacked on the rack; the number of the grinding mechanisms is three, the grinding mechanisms are evenly distributed in the circumferential direction of the glass sheet, each grinding mechanism comprises a plurality of grinding blocks and a plurality of partition pieces which are sequentially and alternately stacked in the vertical direction, and the peripheral face of each grinding block is an annular grinding face. The three sets of grinding mechanisms are arranged, the glass sheets can be clamped and positioned, the glass sheets can be ground, compared with the mode that the glass sheets are clamped through suction cups in the prior art, the glass sheet grinding machine can adapt to more glass sheets with different diameters, enough clamping force can be provided, and the grinding process is more stable. And the multiple stacked glass sheets are separated through the separation pieces correspondingly arranged below the grinding blocks, so that the multiple grinding blocks can grind the multiple glass sheets at the same time, the glass sheets do not need to be manually clamped one by one, and the mounting efficiency and the grinding efficiency are improved.

The present invention concerns a laminated glass, comprising first and second glass sheets and a ply of interlayer material therebetween; a heating element arranged on a surface of the second glass sheet adjacent the ply of interlayer material; a circumference of the heating element spaced from an edge of the second glass sheet forming a circumferential region between the circumference and the edge of the second glass sheet where conductive material of the heating element has been at least partly removed; a conductive ring configured in the circumferential region spaced from the circumference and spaced from the edge of the second glass sheet and electrically isolated from the heating element wherein conductive materials of the heating element and the conductive ring are different.

The invention discloses a silicon-based structure of a micro heat pipe and a processing technology, solves the problems that in the prior art, a metal micro heat pipe for heat dissipation of a silicon-based chip increases the thickness of the chip, and interface stripping and cracking are prone to occurring, and has the beneficial effects that heat dissipation of the micro heat pipe is achieved, and meanwhile the thickness of the silicon-based chip is effectively controlled. According to the specific scheme, the silicon-based structure of the micro heat pipe comprises a silicon-based chip substrate and a glass sheet, the silicon-based chip substrate and the glass sheet are attached together, a liquid absorption core is integrated on the side, facing the glass sheet, of the silicon-based chip substrate, and the liquid absorption core comprises an evaporation section, a heat insulation section and a condensation section which are sequentially connected; the length of the heat insulation section and the condensation section is larger than that of the evaporation section, the evaporation section comprises a plurality of working medium channels, all the working medium channels communicate with the heat insulation section, the working medium channels are arranged in an array mode, and every two adjacent working medium channels communicate with each other.

The application discloses transparent microcrystalline glass and a preparation method thereof, relates to the technical field of microcrystalline glass preparation, and discloses a preparation method of transparent microcrystalline glass, which comprises the following steps: S1, placing a common glass sheet on a lifting loading platform in a high-temperature furnace, then driving a screw rod to rotate through a rotating motor, thereby driving a first nut block to move in an upward direction, and the first nut block drives a bottom base, the lifting loading platform and the glass sheet to move upward; when the outer surface of a heating rod in the high-temperature furnace is attached with a large amount of oxide layers, the cleaning mechanism can be used to open a vertical hydraulic rod to make a top frame descend into a microcrystalline chamber in the high-temperature furnace, at this time, a first motor is opened to drive a T-shaped sliding rail outside an upper arc-shaped brush to slide in an arc-shaped track, then the upper arc-shaped brush and a lower arc-shaped brush surround the heating rod, and the upper arc-shaped brush and the lower arc-shaped brush move up and down to clean the oxide layers on the heating rod in the microcrystalline chamber.

The invention relates to a direct type backlight structure, a preparation method thereof and a liquid crystal display screen, and relates to the technical field of display. The direct type backlight structure comprises a substrate and a plurality of light-emitting structures arranged at intervals, each light-emitting structure comprises a light-emitting element, an optical adhesive layer and a glass sheet, the light-emitting elements are located on one side of the substrate, the glass sheets are located on the sides, away from the substrate, of the light-emitting elements, and the optical adhesive layers are located on one side of the substrate and located between the light-emitting elements and the glass sheets; in the same light-emitting structure, a first orthographic projection of the glass sheet towards the substrate covers a second orthographic projection of the optical adhesive layer towards the substrate, and the second orthographic projection covers a third orthographic projection of the light-emitting element towards the substrate; the optical film layer is located on the side, away from the substrate, of each light-emitting structure. The thin direct type backlight structure can be realized, the partition crosstalk can be reduced, and the display uniformity can be improved.

This invention discloses a controllable patterned wetting microfluidic chip and its preparation method. The preparation method includes the following steps: injecting an alkaline solution into a glass chip channel and allowing it to stand to hydroxylate the surface of the glass chip channel; after standing, cleaning and drying the glass chip channel; then preparing a hydrophobic film on the surface of the glass chip channel; subsequently treating the hydrophobic film to adjust the hydrophobicity of a preset area of ​​the hydrophobic film, thereby obtaining the controllable patterned wetting microfluidic chip. This invention, by preparing a hydrophobic film on the surface of the glass chip channel and then treating it to adjust the hydrophobicity of a preset area, enables the glass chip channel to have different surface properties, fully replicating the complex wetting properties of oil reservoirs. Furthermore, the contact angle can be freely adjusted according to the formation properties, achieving controllable patterned wetting. The fabrication process is simple, low-cost, and does not require expensive equipment.

The utility model relates to a glass sheet conveying belt tensioning device which comprises a conveying base frame, a driving wheel is connected to the conveying base frame in a rotating mode, and a driving source used for driving the driving wheel to rotate is further arranged on the conveying base frame. A conveying tail frame is arranged on the outer side of one end of the conveying base frame in the length direction in a sliding mode relative to the conveying base frame, a driven wheel is rotationally connected to the conveying tail frame, and a conveying belt is in transmission connection between the driving wheel and the driven wheel. The tensioning adjusting mechanism is arranged between the conveying base frame and the conveying tail frame and is used for changing the distance between the conveying base frame and the conveying tail frame, so that the tensioning degree of the conveying belt is adjusted; and the sliding connection mechanism is arranged between the conveying base frame and the conveying tail frame and is used for sliding connection of the conveying base frame and the conveying tail frame when the tension degree of the conveying belt is adjusted. The device can provide better adjustment and use stability, a special sliding connection mechanism is additionally arranged, the relative stability between the driving wheel and the driven wheel during tensioning adjustment can be further guaranteed, and lateral deviation is effectively prevented.

The utility model discloses an internal label pasting mechanism for a photovoltaic module production line, which comprises a first horizontal transfer unit and a sliding frame thereof which are arranged on a machine tool rack, a second horizontal transfer unit and a sliding block thereof which are arranged on the sliding frame, and a lifter and a special-shaped transfer frame thereof which are arranged on the sliding block, the turning unit is arranged on a platform plate of the special-shaped transfer frame in a connected mode, the swing turning unit is arranged below the platform plate and is in butt joint with an output shaft of the turning unit, the labeling unit is arranged at the outward end of a swing rod of the swing turning unit in a connected mode, and the labeling unit is driven to suck a label to be pasted at a material taking station and caters to the edge of a double-layer glass sheet of a photovoltaic module. And a label is attached between the glass sheet layers. According to the internal label pasting mechanism, the switching freedom degree and accurate positioning of the labeling unit among different stations are provided, the labeling unit has the flexible adjusting capacity of taking materials downwards and pasting materials upwards, and the ideal production efficiency and yield are achieved in the specific process link of a photovoltaic module production line.

The utility model belongs to the technical field of glass production, and relates to a transfer device for display glass sheet processing, which comprises a transfer box body, three glass fixing components are mounted in the transfer box body, each glass fixing component comprises a fixed support frame, a support rod is mounted in the middle of each fixed support frame, a support block I is mounted at the bottom of each support rod, and a support block II is mounted at the bottom of each support rod. The first supporting block is rotationally connected with a two-way lead screw, the first supporting block is arranged in the middle of the two-way lead screw, and two driving blocks are symmetrically connected to the two-way lead screw in a threaded mode. The adjusting rod on the glass fixing assembly can support the weight of glass adsorbed by the suction cup, especially when large glass is encountered, the position of the adjusting rod can be adjusted, so that the vacuum suction cup is adsorbed in the middle of the glass, the middle of the glass is effectively supported, and the situation that the glass droops due to the dead weight to form a cantilever beam structure is avoided; the stability of the glass in the transportation process is enhanced.

The present invention relates to a microfluidic chip for an inhalation sprayer. A semi-closed internal cavity is formed by a silicon wafer 1 and a glass sheet 2 by means of anodic bonding, and comprises an inlet end 3 and an outlet end 4; the outlet end comprises a left outlet 41 and a right outlet 42, the left outlet and the right outlet being axisymmetric with respect to the central axis X of the microfluidic chip, and the axis Y of the left outlet and the axis Y' of the right outlet jointly meeting the central axis X at a point A; the outlet end comprises a cutting start line U0, the vertical distance from the point A to the cutting start line U0 being L; the outlet end further comprises a cutting buffer line U1, a fluid in the microfluidic chip being ejected from the cutting buffer line U1, the vertical distance from the cutting buffer line U1 to the cutting start line U0 being a cutting buffer distance L', and L'≤L, so as to ensure that the fluid collides and sprays outside the chip; moreover, the cutting buffer distance can protect the integrity of the outlet end when the microfluidic chip is cut, thus improving the overall quality and yield of microfluidic chips, and reducing costs.

The application relates to the technical field of photoelectric device packaging, in particular to a structure for improving light coupling isolation voltage based on a glass sheet, which comprises a tube shell, a cover plate and an inner porcelain sheet, the inside of the tube shell is provided with a containing cavity, the top of the tube shell is provided with an open structure, the cover plate is adapted to be closed on the open top of the tube shell to form a closed space for the containing cavity; the inner porcelain sheet is arranged in the containing cavity and is spaced apart from the bottom of the containing cavity, a light emitting assembly is arranged on the inner porcelain sheet, a light receiving assembly is arranged at the bottom of the containing cavity, and an isolation glass sheet is further arranged in the containing cavity, the isolation glass sheet divides the containing cavity into an upper chamber and a lower chamber which are independent of each other, the light emitting assembly is located in the upper chamber, and the light receiving assembly is located in the lower chamber. The insulation path between the light emitting assembly and the light receiving assembly is changed from a straight line type to a broken line type by additionally arranging the isolation glass sheet, the creeping distance is prolonged, and the isolation voltage of the light coupling is significantly improved without increasing the overall volume of the package.

The utility model discloses a rectangular plate-shaped workpiece positioning mechanism which comprises a plurality of first positioning pieces and a plurality of second positioning pieces, part of the first positioning pieces are arranged at intervals in the transverse direction so as to abut against the side wall of one long edge of a plate-shaped workpiece, and the other part of the first positioning pieces are arranged at intervals in the longitudinal direction so as to abut against the side wall of the other long edge of the plate-shaped workpiece. The pressing plate is pressed against the side wall of a short edge of the plate-shaped workpiece; the multiple second positioning pieces are each provided with a telescopic structure, and part of the second positioning pieces are arranged at intervals in the transverse direction and correspond to the first positioning pieces arranged at intervals in the transverse direction in a one-to-one mode so that the second positioning pieces can abut against the side wall of the other long edge of the plate-shaped workpiece. The glass plate positioning device has the advantages that a glass plate can be positioned, it is guaranteed that the glass plate and cut small square glass sheets cannot move in the process that the glass plate is cut into pieces, the situation that the glass plate is positioned in a manual hand pressing mode is avoided, the safety of workers is guaranteed, and the positioning effect is also improved.

A laser system is provided for applying modification to a sheet, the laser system comprising the sheet; a first optical element having a first surface and a second surface; and a laser configured to generate a laser beam directed toward the first surface of the first optical element, the laser beam having a first beam profile. The first optical element directs the beam toward the second surface such that the beam has a second beam profile when exiting the second surface, and such that the beam having the second beam profile is directed at the sheet and applies the modification thereto. The system includes a rotary actuator configured to rotate the first optical element by a first angle. As the first optical element rotates, the second beam profile rotates relative to the first beam profile by a second angle, the second angle being at least about 1.5 times the first angle.

The utility model discloses a vibration device and a camera device, and the vibration device comprises a rear cover which is of a hollow cylindrical structure with two open ends and comprises an upper end face, a lower end face and a light through hole, and the light through hole penetrates through the upper end face and the lower end face; the piezoelectric ceramic piece is fixed on the rear cover, and the upper end part of the piezoelectric ceramic piece protrudes out of the upper end surface; the glass sheet is mounted at the upper end part of the piezoelectric ceramic piece and covers the light through hole; the front cover is provided with a receding through hole, the front cover is arranged on the edge of the glass sheet in a sleeving mode, the receding through hole is right opposite to the light through hole, the front cover is fixedly connected with the rear cover, and the front cover is used for fixing the glass sheet to the piezoelectric ceramic piece; and the elastic washer is clamped between the front cover and the glass sheet and is used for relieving the extrusion force on the glass sheet. The piezoelectric ceramic piece is adopted to vibrate the glass piece, so that rain and fog can be quickly removed without influencing the imaging quality of the camera module.

A laminated glass includes an outer glass sheet, an inner glass sheet, an adhesive layer, and a non-metal reflective film that are stacked with each other. The outer glass sheet has a first surface and a second surface. The inner glass sheet has a third surface and a fourth surface. The adhesive layer is located between the second surface and the third surface. The non-metal reflective film is located between the second surface and the adhesive layer, or is located between the adhesive layer and the third surface, or is located on the fourth surface, or is located inside the adhesive layer. A solar direct reflectance RE of the laminated glass measured from a first surface side satisfies RE≥12%. A vehicle includes the laminated glass as described above.

A vehicle sunroof (100) and a vehicle (1000) are provided. The vehicle sunroof (100) includes a sunroof glass sheet (10) and an antenna assembly (20). The sunroof glass sheet (10) includes a light-transmitting portion (11) and an opaque masking portion (12) surrounding the light-transmitting portion (11). The light-transmitting portion (11) is used for allowing light to pass through. The opaque masking portion (12) is connected to a vehicle body and opposite to a ceiling (200), and the antenna assembly (20) is arranged between the opaque masking portion (12) and the ceiling (200). By arranging the antenna assembly (20) between the opaque masking portion (12) of the sunroof glass sheet (10) and the ceiling (200). The antenna assembly (20) will neither affect the exterior design of the vehicle nor increase the wind resistance of the vehicle.

Method and system for breaking an internal shape in a sheet of glass in the flat state. The invention relates to a method for breaking an internal shape (10_INT) in a sheet of glass (10) in the flat state, said method comprising the steps of: - making (E10) a cutting line (T_D) in the sheet of glass using a Bessel beam pulsed laser or laser filamentation, said cutting line delimiting the internal shape with respect to a peripheral shape (10_EXT) complementary to the internal shape, - generating (E20) a temperature gradient between the internal shape and the peripheral shape to break said internal shape. Figure for the abstract: Fig. 2

The utility model relates to the technical field of glass processing equipment, and provides a glass sheet storage device which comprises a frame, and a feeding mechanism, a jacking mechanism and at least one lifting mechanism are installed in the frame. The feeding mechanism comprises at least one rotating shaft, the rotating shaft is rotationally connected with the frame, and the rotating shaft is used for conveying glass sheets; the material ejecting mechanism comprises at least one cross rod, a plurality of material ejecting pieces are installed on the cross rod, and the material ejecting pieces have the function of stretching and retracting up and down; the lifting mechanism comprises a second chain, the second chain is provided with at least one material bearing rod, and the material bearing rods are used for bearing glass sheets. According to the glass sheet storage device, the feeding mechanism, the jacking mechanism and the lifting mechanism are integrated, accurate storage and taking of the glass sheets are achieved, the problem that a traditional storage device can only output the whole layer of glass sheets integrally is solved, a user can take out the needed glass sheets independently according to actual requirements, and the use is convenient. And the storage state of other glass sheets cannot be influenced.

This invention discloses a three-dimensional waveguide glass chip based on CPO (Continuous Photonic Optical Array) with an integrated weak-reflection grating sensor array, relating to the field of integrated photonic sensors. The three-dimensional waveguide glass chip of this invention has a multi-core single-mode fiber array connection unit on the left end and a single-mode multi-core fiber optic connection unit on the right end, connected in the middle by a femtosecond laser direct-write multi-channel three-dimensional waveguide. The end directly connected to the optical chip also integrates a weak-reflection fiber grating for temperature measurement. Simultaneously, multiple three-dimensional waveguide glass chips connect to the optical chip, forming a grating temperature sensing array. The signal processing end uses host computer software to perform real-time online monitoring of optical loss and the periphery of the optoelectronic chip interface. This three-dimensional waveguide high-density optical connector with an integrated weak-reflection grating sensor array for CPO applications features low loss, low power consumption, high capacity, and multifunctionality, and can monitor chip temperature and interface quality using non-primary communication bands.

The invention discloses an electric field sensor field enhancement cover plate and a preparation method thereof, and belongs to the technical field of micro electro mechanical system manufacturing. The method comprises the following steps: etching a groove on the silicon surface of a silicon wafer or an insulator to form a reinforcing structure; preparing a flat to-be-bonded surface through a bonding and thinning process; performing laser cutting on the glass sheet to form a reserved hole; and bonding the glass sheet and the bonding surface to form the cover plate. Optional steps include sputtering a getter and a metal bonding layer. The bonding process is used for replacing traditional glass backflow, two photoetching steps are omitted, the problems that glass filling is uneven and the surface is uneven are solved, the technological process is remarkably simplified, and the yield is improved. The method is suitable for wafer-level electric field sensor packaging, and the sensitivity and reliability are improved.

A package substrate includes: a sheet including glass; build-up layers respectively on a top surface and on a bottom surface of the sheet; structures defining electrically conductive pathways within the sheet and within the build-up layers; and a ribbon-shaped edge structure in recesses defined at lateral edges of the sheet and defined with respect to lateral edges of the build-up layers, the ribbon-shaped edge structure extending in a direction along a thickness of the sheet, having a lateral edge surface facing away from the sheet, and comprising an edge structure material not including glass and not including metal.

The utility model discloses a cutting device for efficiently cutting optical glass sheets, which belongs to the technical field of glass processing and comprises a protective box, electric push rods are mounted on two sides of the bottom inside the protective box, the output ends of the electric push rods are connected with wire cutters, and the output ends of the wire cutters are connected with cutting wires; a movable mounting disc penetrates through the top and the bottom of the protection box, U-shaped guide rails are mounted at the two ends of the top of the movable mounting disc, and the outer walls of the U-shaped guide rails are sleeved with U-shaped pieces. According to the glass rod cutting device, the movable mounting discs are arranged at the top and the bottom of the interior of the protection box, and each group of movable mounting discs is provided with a part for fixing the end part of a glass rod, so that the two ends of the glass rod can be fixed during cutting; and therefore, potential safety hazards and damage to the glass sheets caused by the fact that the glass sheets easily and directly fall off or fly out after cutting can be avoided.

Laminated bulletproof glass holds significant importance in research and development efforts aimed at enhancing material performance and the manufacturing process of laminated bulletproof glass itself. The objective is to create laminated bulletproof glass sheets that incorporate layers of float glass, high-strength synthetic glass, or high-strength synthetic glass with heat-reflective properties. These glass layers are interspersed with layers of polymer-type interlayer material in a specific arrangement pattern and then subjected to a specialized heat and pressure treatment process under controlled conditions. Finally, the assembly is bonded with polycarbonate using silicone adhesive. The resulting product provides protection levels ranging from NIJ 3A, with a total glass thickness between 28 millimeters and no more than 32 millimeters, up to NIJ 3, with a total glass thickness between 33 millimeters and no more than 38 millimeters.