WO2020012228A1 - Packaging system for electrostatic discharge sensitive devices - Google Patents

Abstract

The present application relates to a packaging system for settlement and transporting electronic systems which allows the accommodation of components for the stow and transport of electronic systems. The aim of this technology is to present the design of an electrostatic dissipative packaging solution with ergonomic features, composed by a tote box (1) with double sided smooth side walls (4), a planar solid bottom (3), two ergonomic shell handle (7), a rectangular opening section (13)(8), and a lid (2) with a top area (12) with structural ribs (11), that allow easy stacking. Each double side walls (4) is interconnected by an upper rim (5). Structural performance is guaranteed by the double side walls and double end walls. The developed solution also allows traceability and the electronic identification based on embedded RFID technology and Electronic System Labelling.

Description

DESCRIPTION

"PACKAGING SYSTEM FOR ELECTROSTATIC DISCHARGE SENSITIVE

DEVICES"

Technical field

The present application relates to a packaging system suitable to accommodate components, e.g. stackable trays, frames, dividers, for settlement and transporting fragile electronic systems while protecting from damage caused by electrostatic discharge.

Background art

Electronic equipment or devices are a part of daily life in the most various fields. Within market demand, and technological advancements, for new products with enhanced functionality, electronic equipment has become more specific and more common. Electronic equipment are products consisting in assembled components, which include functional electronic systems, as for example, printed circuit boards (PCBs) . PCBs can be classified as electrostatic discharge sensitive devices (ESDS), meaning that, damage may occur to its structure based on electrostatic discharges (ESD) and fields, during typical operational and transportation tasks. During the fabrication of PCBs, typically there are workstations where mounting components, testing, milling, and other operational tasks are performed in order to achieve the functional electronic system and the final assembling of the electronic equipment. Between workstations, packaging and transportation of the PCBs is necessary. Due to the high fragility of the electronic systems, to electrical discharges and strain/stress efforts applied to the components, a secure and safe means of settlement and transport is mandatory. A wide diversity of containers is available which are not specifically designed for storing and transporting PCBs . Examples include containers in the form of baskets, cabinets, carts, tote boxes, from which, the majority is inflexible and cannot be adjusted to accommodate different sized PCBs. Other types of containers present complex designs, which makes them cumbersome and difficult to handle by the workers. Commonly employed building materials include lightweight metals, cardboard and plastic usually modified to present electrostatic properties .

Packaging systems produced from cardboard have been developed and patented in the past for the transport of electrostatic sensitive devices. Integration of anti-static additives is usually the approach, either by incorporating a carbon layer in the corrugated board walls to function as a static barrier, as in U.S. Pat. No. 4,482,048, or by coating the paperboard with conductive coatings from the inside to the outside of the container, with a sandwiched thin metal foil in effective contact with the conductive material, as in U.S. Pat. No. 4, 684,020. The last integrates dividers and pads to form a plurality of walled cells within the container to completely enclose a packaged article susceptible to electrostatic discharge.

Regarding plastic solutions for the storage and transport of PCBs, the developed solutions range from a container for a single PCB, as in U.S. Pat. No. 6,401,930B1 and U.S. Pat. No. 5,738,219A, multilayer electrostatic discharge protection bag, also for a single PCB, as in U.S. pat. No. 5,791,485, to cabinets to pack large numbers of PCBs, as in U.S. Pat. No. 5,201,415. Alternative disclosed solutions include the development of structures to be integrated within a tote box. U.S. Pat. No. 4,527,222 describes a structurally integrated insert that is adjustable to accommodate circuit boards, of various widths and heights, and is easily assembled in a tote box. In U.S. Pat. No. 4,763,782 a holder device, with common wall dividers and slotted holding members, allows variable configurations for the manual placement and removal of the different sized circuit boards, inside tote boxes. U.S. Pat. No. 4,426,675 presents a frame formed of four members, two sides and two ends, which can be assembled to give predetermined variable space between the sides. The sides present channel members clip to the inner surfaces for the reception of circuit board. The frame is easily integrated in an open top box and both are made of metal while the channels can be of electrically conductive plastic. In G.B. Pat. No. 2,303, 118A a structure to be assembled into a container to provide flexibility for accommodating, holding and storing, a range of different sizes of PCBs is disclosed.

Other design solutions comprehend, for example, tote boxes with equidistant grooves inside two opposing side walls and two opposing end walls to adjustably position a divider, also presenting equally spaced grooves, to accommodate PCBs of different lengths, as in U.S. Pat. No. 4,261,465 and U.S. Pat. No. 4,261,464. In U.S. Pat. No. 4,506, 785 the concept is similar to the previous ones, with exception of the resorting to colour coded dividers to indicate discrete offset positioning of edge tabs.

Within the increasing specificity and fragility of the ESDS, transporting solutions started to consider tote boxes without any internal grooves, or structural inserts allowing this way, the employment of stackable dedicated trays, to safely hold the PCBs within the tote box. The use of simpler design solutions for the tote box simplified and facilitated the fabrication process becoming, consequently, less expensive. Advantages include a certain level of universality, as the specificity of design is in regarding to the dedicated tray, and a simpler cleaning process previous to a new utilization. Examples of patented stackable trays include U.S. Pat. No. 7,410,060, U.S. Pat. No. 6,868,970B2 and U.S. Pat. No. 5,335,771A which disclose stackable trays for integrated circuits including an upper and lower side which present support elements, forming ledges and ridges, to sustain and stabilize the integrated circuit chips; and U.S. Pat. No. 5,474,178A which presents a tray for supporting electrical connectors of the type having an elongated dielectric housing within which electrical terminals are secured. In regarding to the tote boxes and containers that may integrate the stackable dedicated trays, two types of solutions are available, only stackable and stackable and nestable. Stackable and nestable solutions typically consist of a tote box presenting a slight inclination angle in all side and end walls, and a separated lid with structural ribs. When assembled the lid to the tote box, it allows stacking in a pile while, when the lid is removed, it is possible to stack the tote boxes within each other, as in U.S. Pat. No. 3,379,341 and U.S. Pat. No. 5,964,372. Similar solutions, with the exception of a two-piece hinged lid along the top of opposite side of the tote box, is disclosed in U.S. Pat. No. 6, 431,394 B2 and U.S. Pat. No. 5, 328,048. Regarding only stackable solutions, tote boxes with two side and two end walls, that rise up from a planar bottom, presenting reinforcing ribs, vertical and horizontal that protrude from the walls on their outwardly facing surface, are described, as in U.S. Pat. No. 8, 844,759 B2 and U.S. Pat. No. 2011/0127275 A1. Another design solution includes a double planar bottom with a multiplicity of ribs in between, and more reinforcement features over the side and end walls, as in U.S. Pat. No. 2017/0001756 A1.

The handles are an important feature of a tote box, still, little emphasis to ergonomic aspects and ease of use is reported in patents. Examples of disclosed solutions include the use of structural horizontal ribs directly as handles, as in U.S. Pat. No. 2017/0001756 A1 or to provide hand hold areas that are blind holes or through holes, as in U.S. Pat. No. 4,620,644, and elongated hand-holes having rounded ends formed in the upper area of each side wall, as in U.S. Pat. No. 3,002,650.

Other examples comprise shell handles that forms an opening angle of 90° with a straight edge, as in U.S. Pat. No. 8, 844,759B2 and U.S. Pat. No. 2011/0127275 Al, or with slight curvatures in the edge which conforms accurately to the fingers, as in U.S. Pat. No. 6, 431,394 B2. Another handle concept is disclosed in U.S. Pat. No. 4,523,692 presenting an arcuate hand grip with an aperture.

None of the researched patents that disclose packaging solutions for electronic devices englobe the integration of radio frequency identification (RFID) for traceability neither an electronic identification based on electronic labelling system.

Summary

The present application relates to a packaging system for electrostatic discharge sensitive devices comprising a tote box (1) comprising a planar solid bottom (3) ; four smooth double side walls (4), surrounding the planar solid bottom (3), interconnected on the rounded lateral edges; two ergonomic shell handles (7) over each double side walls

(4), correspondent to the width laterals; an opening section (8) to the right of a shell handle (7), and each double side walls (4) is interconnected by both an upper rim (5) and by a plurality of structural vertical ribs (6) that protrude from the upper rim (5) downwards in the direction of the planar solid bottom (3), without reaching it; and a lid (2) comprising a single rectangular structural rib (9) that projects perpendicularly from the bottom area (10); and a plurality of structural ribs (11) which project perpendicularly from the top area (12) .

In one embodiment the outer side wall of the double side walls (4) have a height between 3 to 5 mm smaller in comparison with the inner wall, not reaching the planar solid bottom (3) .

In another embodiment the shell handle (7) is located at the midsection, being in direct contact with the upper region of two structural vertical ribs (6), creating an open section in between.

In yet another embodiment the shell handle (7) presents a rounded shape combined with a large opening angle greater than 90° and a wide section area.

In one embodiment the opening section (8) comprises a specific electronic labelling system mechanically locked.

In one embodiment the electronic labelling system is mechanically locked by snap-fit joints. In another embodiment several packaging systems, assembled tote box (1) and loose lid (2), are stacked by fitting the planar solid bottom (3) of the tote box (1) on the smooth available top area (12) of the loose lid (2) inside the available area demarked by the plurality of structural ribs

(11) ·

In one embodiment the packaging system is produced by injection moulding technology, with an electrostatic dissipative thermoplastic material.

In one embodiment the electrostatic dissipative thermoplastic material is obtained by modifying a thermoplastic material with an anti-static dissipative material .

In another embodiment the thermoplastic material is selected from a list comprising polypropylene, acrylonitrile butadiene styrene, polycarbonate and polyamide .

In another embodiment the anti-static additive is selected from carbon powder or carbon fiber.

In yet another embodiment the anti-static additive is used in a range from 10 to 20%.

The present application also relates to a process of injection moulding to produce the packaging system, wherein the moulding process starts with loading of the material onto the hopper with a controlled passage of the polymer into the barrel where the polymer is molten by a combination of heat and mechanical friction caused by the screw which also moves the molten polymer forward into the direction of the nozzle; the molten polymer is then injected under pressure into the pre-defined moulding cavity where it acquires a specific shape during cooling under pressurization; once achieved a mould temperature assuring dimensional stability in the part, it is possible to eject the moulded part.

In one embodiment the moulding temperature occurs between 200 and 250 °C.

In another embodiment the packaging system is used in the transport and protection of electrostatic discharge sensitive devices.

In yet another embodiment the packaging system is used as a housing for control units or other electrostatic discharge sensitive devices.

General description

The present technology relates to an electrostatic dissipative packaging solution with ergonomic features, composed by a tote box with double sided smooth side walls and a lid with features that allow easy stacking. The developed solution also allows integrating systems to provide traceability and electronic identification.

In regarding to packaging solutions for the safe settlement and transportation of PCBs, some issues may be found mainly related to the building material, the developed design concepts and, by consequence, in the fabrication, operation and cleaning processes. For instance, in regarding to building material, employing cardboard for the fabrication of a packaging solution provides poor resistance to structural efforts during intensive use, and also requires additional fabrication steps to provide the electrostatic properties necessary to avoid premature damage, based on electrostatic discharges or fields. The use of anti-static coatings and carbon layers are propitious to induce damage and contamination of the PCBs by carbon particles. Other materials, such as lightweight metals, although improving the structural performance, increase the total packaging weight and are not the most adequate for electrostatic discharge, due to the high conductivity, which causes rapid charges to flow to the ground or to another conductive object, increasing damage occurrence over the PCBs.

Plastic materials are also common, typically modified with additives to improve mechanical and electrical properties. Most available solutions include plastics at the conductive range presenting similar issues to the metallic solutions.

Regarding design, single packaging is counter-productive as it only allows a single PCB to be transported at a time, while cabinets allow the transport of larger quantities with the drawback of becoming heavy and difficult to carry by hand.

The development of structures to be integrated within a tote box, such as, frames and dividers, allow adjustability and flexibility to different sizes of PCBs, however, the configuration assembly increases complexity of use and cleaning, and consequently, time spent per task. In general, plastic and metal are used as building materials making the fabrication process more expensive.

The employment of tote boxes with grooves over the inside of the side and end walls also increases complexity and cost . Within the development of stackable dedicated trays, for the accommodation of PCBs within a tote box, stackable and nestable tote boxes, without any internal grooves, became commonly adopted solutions. Both solutions present structural reinforcing features, such as ribs and holes, over the external walls and, in some cases, over the bottom. The large number of protruding features adds complexity to the fabrication process, while simultaneously, hinders the cleaning process after use. Additionally, in the case of nestable tote boxes, the inclination angle over the side and end walls, between the bottom and the open top, is such that the bottom area is slightly smaller than the upper area, preventing the adequate use and fitting of a dedicated tray.

The handling of packaging solutions is often discarded, and solutions that englobe holes and structural ribs as handles create complexity to the design and do not improve comfort to the user. The use of handles with slight curvatures may improve the ergonomic performance, although, when combined with an opening angle of 90°, the comfort is greatly diminished .

Another limitation is in regarding to the absence of fitting features that allow the embedding of functional components, as for example, an electronic system labelling for automatic information update. Furthermore, the use of conductive materials hampers the integration of RFID tags for product traceability, as the material induces electromagnetic shielding by disrupting and blocking the signal .

Therefore, the main challenge of the proposed polymeric packaging solution is to present an ergonomic, simple and smooth design, while assuring structural performance, simplifying both the fabrication and cleaning process, while combining material properties and design features to allow the embedding of an electronic identification and traceability by means of a RFID tag.

The subject technology consists in a packaging system, composed by two main components, a tote box and a lid. The packaging system allows the placement within of frames and dividers, and stackable trays for the settlement and transport of PCBs and also other ESDS (e.g. integrated circuits) . An alternative approach for the design concept was combined with an electrostatic dissipative material leading to improvements regarding the overall fabrication process, operation performance, and cleaning process.

The design concept for the tote box contains an entire external smooth surface and a thick solid planar base which simplifies the cleaning process, while reducing its frequency. Structural performance is guaranteed by double side walls and double end walls, which comprise several vertical ribs for reinforcement in specific regions. The design also incorporates an ergonomic curved shell type handle with a larger curvature angle, greater than 90°, and a wide area for the correct and comfortable placement of the fingers. The design of the shell handle also simplifies the lid removal from the tote box avoiding this way, the need of an additional handle section over the lid. Specific features on a double end wall allow easy embedding and removal of a specific electronic labelling system, adding functionality to the packaging system. The integration of an electronic labelling systems improves the logistics process by allowing a real time update of the packaging content identification code and quantity, among other important information, if necessary.

The lid design concept considers, on one side, a single rectangular structural rib that assures a one way fit assembly with the tote box while, on the other side, the lid exhibits a plurality of ribs that fit the bottom of the tote box, facilitating the stacking.

Regarding the building material, a thermoplastic material was modified with an anti-static additive. This modification assures electrostatic properties at the dissipative range, which greatly improve the performance of the material when subjected to an electrical discharge or field by allowing a slower and, consequently more controlled and safe, electrostatic discharge. The application of such material greatly reduces the damage probability over the ESDS . Additionally, this building material reduces the shielding effect, blocking or disruptance of signal, improving the traceability and reading of signal for RFID technology based in UHF frequency. By facilitating the integration of an RFID tag and improving its performance, this packaging solution allows the tracking of the packaging across specific pre defined locations and account the time spent per location. Combined with the electronic labelling system, the added technology to the packaging provides great functionalization and control, improving the systematization and organization of the company's logistics .

The production of the packaging system is based on injection moulding by means of two moulding tools, one for the tote box and another for the lid. The moulding tool for the tote box requires only one movement simplifying the manufacturing process, in comparison with the existent packaging solutions.

Brief description of drawings

For easier understanding of this application, figures are attached in the annex that represent the forms of implementation which nevertheless are not intended to limit the technique disclosed herein.

Figure 1A shows a perspective top view of tote box, wherein the numbers refer to: 1 - tote box; 3 - planar solid bottom; 4 - double side walls; 5 - upper rim; 7 - ergonomic shell handle; 8 - opening section; 13 - detailed view of the opening section.

Figure IB shows the tote box and lid wherein the numbers refer to: 1 - tote box; 2 - lid; 3 - planar solid bottom; 4 - double side walls; 5 - upper rim; 7 - ergonomic shell handle; 8 - opening section; 11 - rectangular structural ribs; 12 - top area; 13 - detailed view of the opening section .

Figure 2 shows the bottom view of the tote box wherein the numbers refer to: 3 - planar solid bottom; 4 - double side walls; 6 - structural vertical ribs; 7 - ergonomic shell handle; 14 - detailed view of corners of the tote box.

Figure 3 is a detailed view (14) of the corners of the tote box, wherein the numbers refer to: 3 - planar solid bottom; 5 - upper rim; 6 - structural vertical ribs. Figure 4 shows the bottom side of the lid of the tote box, wherein the numbers refer to: 2 - lid; 9 - rectangular structural rib; 10 - bottom area.

Figure 5 shows the top side of the lid of the tote box, wherein the numbers refer to: 2 - lid; 11 - rectangular structural ribs; 12 - top area.

Figure 6 shows tote boxes stacked wherein the numbers refer to: 1 - tote box, 2 - lid; 3 - planar solid bottom; 6 - structural vertical ribs; 9 - rectangular structural rib; 11 - rectangular structural ribs; 15 - detailed view of the shell handle area.

Figure 7 shows a detailed view (15) of the shell handle area wherein the numbers refer to: 1 - tote box; 2 - lid; 7 - ergonomic shell handle.

Description of embodiments

Now, embodiments of the present application will be described with reference to the annexed drawings. However, they are not intended to limit the scope of this application .

The present application relates to a packaging system suitable to accommodate either stackable trays, or to place within frames and dividers, allowing the safe settlement and transportation of ESDS between workstations where assembling components, testing, and milling operations occur .

The packaging includes a tote box (1) and a loose lid (2) which can be assembled in a unique manner, providing protection from damage to its content, while potentiating stacking .

The tote box (1) comprises a planar solid bottom (3); four smooth double side walls (4) surrounding the planar solid bottom (3), interconnected on the rounded lateral edges; two ergonomic shell handles (7) over each double side walls (4) correspondent to the width laterals; an opening section

(8) to the right of a shell handle (7), and each double side walls (4) is interconnected by both an upper rim (5) and by a plurality of structural vertical ribs (6) that protrude from the upper rim (5) downwards in the direction of the planar solid bottom (3), without reaching it.

The lid (2) comprises a single rectangular structural rib

(9) that projects perpendicularly from the bottom area

(10); and a plurality of structural ribs (11) which project perpendicularly from the top area (12) .

The opening section (8) allows the integration of a specific electronic labelling. In one embodiment the tracking system can be based in RFID technology. In another embodiment the electronic labelling system is based in Electronic System Labelling (ESL) . The specific electronic labelling system for product information identification is embedded and mechanically locked in the opening section (8) . In one embodiment the labelling system is locked by snap-fit joints.

Figure 1 shows a perspective top view of the tote box (1) which includes a planar solid bottom (3) and four smooth surrounding double side walls (4) interconnected on the rounded lateral edges forming the useful area, where the intended content may be accommodated. The outer side wall of the double side walls (4) presents a slightly smaller height, between 3 to 5 mm smaller in comparison with the inner wall, not reaching the planar solid bottom (3), as visible in Figure 2.

Each double side walls (4) is interconnected by both an upper rim (5), and, as visible in the perspective bottom view of the tote box presented in Figure 2, by a plurality of structural vertical ribs (6) that protrude from the upper rim (5) downwards in the direction of the planar solid bottom (3), without reaching it, as shown in more detail (14) in Figure 3.

Over each double side walls (4), correspondent to the width dimension of the tote box (1), is an ergonomic shell handle (7), tested and validated in real context of use. The shell handle (7) is located at the midsection, being in direct contact with the upper region of two structural vertical ribs (6), creating an open section in between.

The loose lid (2) functions as a cover of the available useful area of the tote box (1) providing reinforcement of the stacking support and protection of the content of the packaging system. It presents a single rectangular structural rib (9) that projects perpendicularly to the smooth available bottom area (10), as illustrated in Figure 4, and a plurality of structural ribs (11) which project perpendicularly from smooth available top area (12), represented in Figure 5.

A cross section view of a stacking situation is depicted in Figure 6. The stacking is performed between several packaging systems, the tote box (1) and loose lid (2) assembled, which are placed on top of another. During the stacking, a tote box (1) is positioned on top of the loose lid (2) . The stacking between the tote box (1) and loose lid (2) is made in a singular assembly position which is defined by the available area defined by the plurality of structural ribs (11) . The planar solid bottom (3) of the tote box (1) is placed on top of the external top area (12) of the loose lid (2) . The plurality of structural ribs (11) provide this way an easy and supported stacking. Regarding the fitting between the tote box (1) and loose lid (2) for closing the packaging, it is achieved by perfect fitting, in a singular assembly position, of the single rectangular structural rib (9) within the useful area of the tote box (1) . The inner walls of the four double side walls (4) are in direct contact with the external surface of the single rectangular structural rib (9) .

Figure 7 shows a detail (15) of the stacking at the shell handle (7) area. The design of the shell handle (7) presents a rounded shape which, combined with a large opening angle, greater than 90°, and a wide section area, improves both the positioning of the fingers and the comfortable handling of the packaging with filling load. It also facilitates the disassembling of the loose lid (2) from the tote box (1), through the slight curvature and inclination of the available section area of the shell handle (7), avoiding this way, the need of an extra handle feature over the loose lid (2) .

The developed packaging system would be produced by injection moulding technology, with an electrostatic dissipative thermoplastic material. The electrostatic dissipative thermoplastic material is obtained from modifying a thermoplastic material with an anti-static additive. The thermoplastic material is selected from a list comprising polypropylene, acrylonitrile butadiene styrene, polycarbonate and polyamide. The anti-static additive is used in a percentage ranging between 10 and 20%. The anti-static additive is selected from carbon powder or carbon fiber.

The moulding process starts with loading of the material onto the hopper which allows the controlled passage of the polymer into the barrel where the polymer is molten by a combination of heat and mechanical friction caused by the screw which also moves the molten polymer forward into the direction of the nozzle. The molten polymer is then injected under pressure into the pre-defined moulding cavity where it acquires a specific shape during cooling under pressurization. Once achieved a mould temperature which assures dimensional stability in the part, it is possible to eject the moulded part. The described process is identical for both the tote box (1) and loose lid (2) . The moulding process occurs at a temperature between 200 and 250 °C.

The concept design for the tote box (1) particularly improves the overall fabrication process, due to the smooth surfaces and internal vertical structural ribs, simplifying the moulding tool design, in comparison to the typical tote boxes which present projection ribs, rims, and in some cases, protrusions which add complexity.

The material combination with the design simplicity reduce the interferences of communication, shielding effect, based in, for example, radio frequency identification, which combined to an ergonomic design, and an additional functionality based on the electronic identification embedding possibility, allow to enhance the operation performance and reduce the cleaning frequency.

This packaging system can be used in the transport and protection of electrostatic discharge sensitive devices, but also can be used as a housing for control units or other electrostatic discharge sensitive devices.

This description is of course not in any way restricted to the forms of implementation presented herein and any person with an average knowledge of the area can provide many possibilities for modification thereof without departing from the general idea as defined by the claims. The preferred forms of implementation described above can obviously be combined with each other. The following claims further define the preferred forms of implementation.

Claims

1. Packaging system for electrostatic discharge sensitive devices comprising the following elements:

-A tote box (1) comprising a planar solid bottom (3); four smooth double side walls (4), surrounding the planar solid bottom (3), interconnected on the rounded lateral edges; two ergonomic shell handles (7) over each double side walls (4), correspondent to the width laterals; an opening section (8) to the right of a shell handle (7), and each double side walls (4) is interconnected by both an upper rim (5) and by a plurality of structural vertical ribs (6) that protrude from the upper rim (5) downwards in the direction of the planar solid bottom (3), without reaching it;

-A lid (2) comprising a single rectangular structural rib (9) that projects perpendicularly from the bottom area (10); and a plurality of structural ribs (11) which project perpendicularly from the top area (12) .

2. Packaging system according to claim 1, wherein the outer side wall of the double side walls (4) have a height between 3 to 5 mm smaller in comparison with the inner wall, not reaching the planar solid bottom (3) .

3. Packaging system according to any of the previous claims, wherein the shell handle (7) is located at the midsection, being in direct contact with the upper region of two structural vertical ribs (6), creating an open section in between.

4. Packaging system according to any of the previous claims, wherein the shell handle (7) presents a rounded shape combined with a large opening angle greater than 90° and a wide section area.

5. Packaging system according to any of the previous claims, wherein the opening section (8) comprises a specific electronic labelling system mechanically locked .

6. Packaging system according to the previous claim, wherein the electronic labelling system is mechanically locked by snap-fit joints.

7. Packaging system according to any of the previous claims, wherein several packaging systems, assembled tote box (1) and loose lid (2), are stacked by fitting the planar solid bottom (3) of the tote box (1) on the smooth available top area (12) of the loose lid (2) inside the available area demarked by the plurality of structural ribs (11) .

8. Packaging system according to any of the previous claims, wherein it is produced by injection moulding technology, with an electrostatic dissipative thermoplastic material.

9. Packaging system according to the previous claims, wherein the electrostatic dissipative thermoplastic material is obtained by modifying a thermoplastic material with an anti-static dissipative material.

10. Packaging system according to the previous claim, wherein the thermoplastic material is selected from a list comprising polypropylene, acrylonitrile butadiene styrene, polycarbonate and polyamide.

11. Packaging system according to the previous claim, wherein the anti-static additive is selected from carbon powder or carbon fiber.

12. Packaging system according to any of the previous claims, wherein the anti-static additive is used in a range from 10 to 20%.

13. Process of injection moulding to produce the packaging system described in claims 1 to 12, wherein the moulding process starts with loading of the material onto the hopper with a controlled passage of the polymer into the barrel where the polymer is molten by a combination of heat and mechanical friction caused by the screw which also moves the molten polymer forward into the direction of the nozzle; the molten polymer is then injected under pressure into the pre-defined moulding cavity where it acquires a specific shape during cooling under pressurization; once achieved a mould temperature assuring dimensional stability in the part, it is possible to eject the moulded part.

14. Process according to the previous claim, wherein the moulding temperature occurs between 200 and 250°C.

15. Use of the Packaging system as described in any of the claims 1 to 12, in the transport and protection of electrostatic discharge sensitive devices.

16. Use of the Packaging system as described in any of the claims 1 to 12, as a housing for control units or other electrostatic discharge sensitive devices.