Ultra fine line cable and a method for fabricating the same

The invention is a fine line electrical cable with two ends having a plurality of first conductor lines in a plane. The lines of the cable are embedded in an insulating laminate material, are closely spaced at one end to be compatible with the closely spaced contacts from IC chips and are fanned out along the length of the cable to the other end where the lines are spaced somewhat apart and compatible with conventional electrical connectors. Contact posts extent from each line end so that external connections may be made with the IC chips and the conventional connectors. At least one second conductor line may be embedded within the other side of the laminate material and appropriate contact posts extend from the line ends so that external connections may also be made at these locations. A method for fabricating the fine line elecrical cable is also disclosed.

FlELD OF THE INVENTION 
This invention is directed to a cable which provides mating to electrical 
contacts associated with electronic interconnections to integrated circuit 
chips. More particularly this invention is directed to a cable having 
closely spaced fine lines and a method of fabrication for the same. 
BACKGROUND OF THE INVENTION 
The miniaturization of electronic circuitry such as that provided through 
integrated circuit chips has created a need for electrical connectors that 
are compatible with the closely spaced contacts of IC chips. One solution 
to this problem is through the use of devices known as IC chip carriers. 
An IC chip carrier is a housing into which a single chip is placed. 
Connections are made to the appropriate terminals of the IC chip and then 
fanned out to external contacts on the carrier at spaced distances which 
are more acceptable for mating with conventional circuitry. In this way a 
chip contained within an IC chip carrier has external connections on the 
carrier which may be connected to conventional circuitry. 
However, with wafer scale integration technology, a plurality of IC chips 
may now be fabricated upon a common wafer such that chip carriers for 
individual chips are no longer feasible. It is possible for a wafer to 
contain at least fifteen separate IC chips and the external connections 
for these chips are closely spaced on the perimeter of the wafer. It would 
not be practical to put the entire wafer in a chip carrier and thereby 
expand the connections to be compatible with conventional connectors. A 
design is necessary that will act as an interface between the chips on a 
wafer and conventional connectors. 
An object of this invention is to fabricate an ultra fine line cable 
capable of providing electrical connection between the IC chip connectors 
on a wafer to other external connections. 
Another object of this invention is to fabricate an ultra fine line cable 
capable of providing electrical connection between the IC chip connectors 
on a wafer to the IC chip connectors of another wafer. 
Another object of this invention is to develop a method to produce these 
ultra fine line cables in a manner that provides accuracy but at the same 
time may be fabricated efficiently and at a relatively low cost. 
Still another object of this invention is to utilize the inherent accuracy 
of additive processes to deposit fine line circuits for the cables. 
Still another object of this invention is to develop a fine line cable that 
has sufficient flexibility to alleviate the need for the exact alignment 
between components a rigid cable or connector would require. 
SUMMARY OF THE INVENTION 
A method is disclosed of fabricating an elongated cable having closely 
spaced lines for interconnecting spaced apart integrated circuits 
comprising a plurality of closely spaced elongated planar first conductor 
lines in a first plane insulatingly spaced from at least one elongated 
planar second circuit line with contact posts extruding from opposed ends 
of each of the first conductor lines and from opposed ends of the at least 
one planar second conductor line. The method comprises the steps of first 
fabricating a first cable panel by depositing upon a first layer of 
conductive material having two opposed ends a plurality of raised 
electrically conductive closely spaced elongated planar first conductor 
lines of a known length having first and second ends and also depositing 
upon the first base layer at least a pair of electrically conductive 
vertical connecting pillars extending above the planar first conductor 
lines, each of the pillars of a pair positioned near each opposed end of 
the first base layer and positioned beyond the ends of the first conductor 
lines. A second cable panel is fabricated by depositing at least one 
raised electrically conductive elongated planar second conductor line upon 
a second base layer of conductive material, the second conductor line 
being of a length at least equal to the distance between opposing pairs of 
vertical pillars of the first cable panel. The first cable panel and the 
second cable panel are laminated together with a thin flexible laminate 
insulating material being disposed therebetween with the vertical pillars 
extending through the laminate to electrically contact opposite ends of 
the second conductor line. Selected area of the first base layer of 
conductive material are then removed to expose the ends of the first 
conductor lines and the ends of the vertical pillars and to simultaneously 
provide the necessary electrical conduction for electrolytical deposition 
upon the first conductor line ends and the vertical pillar ends. Vertical 
contact posts of conductive material are then electrolytically deposited 
upon the exposed ends of the first conductor lines and the exposed ends of 
the pillars. The remaining portions of the first conductive base layer are 
then removed to electrically insulate the contact posts and the first 
conductor lines. The second conductive base layer is then removed. Finally 
a layer of electrical insulation is then disposed upon the exposed 
surfaces of the laminated first and second cable panels and permitting the 
contact posts to protrude through the layer to provide electrical access 
to the flexible cable. 
Furthermore an elongated flexible cable fabricated utilizing the method 
above is disclosed and claimed.

DESCRIPTION OF THE PREFERRED EMBODIMENT 
The invention described in the present application will enable fine line 
cables to be produced using an additive process. The lines will not be 
etched thereby greatly increasing the dimensional integrity of the lines 
and spaces. Using this process, the lines are provided with better 
stability during lamination. 
As an overview, FIG. 1 shows an ultra fine line cable 10 having a plurality 
of fine lines 15 electrically contacting a plurality of wafer connections, 
similar to connections 20, which are interconnected to a plurality of 
integrated circuit (IC) chips 25 fabricated upon a dielectric wafer 30. 
The cable 10 and the wafer 30 are both secured to a mounting plate 35. 
Through the use of the cable 10, the closely spaced wafer connections 20 
may be fanned out such that conventional connecting techniques may be 
utilized at the other end of the cable 10. Note that while only a limited 
number of fine lines 15 are shown in FIG. 1, a single cable may have many 
more lines. The cable 10 connects to the wafer connection 20 through 
vertical contact posts (not shown). 
Referring now more particularly to FIG. 2, an exploded view of one 
embodiment of the cable 10 is presented. The elongated cable 10 shown in 
FIG. 2 is inverted from that shown in FIG. 1 for clarification. A thin 
laminate electrically insulating material 50, which preferably is made of 
a flexible material, having a first side 51, a second side 52, a first end 
55 and a second end 57 has approximately rectangular openings 59 and 60 to 
permit vertical connecting pillars 65 and 67 to pass therethrough. A 
plurality of first conductor lines 70, each with a first end 71 and a 
second end 72, are embedded within the first side 51 of the laminate 
material 50. 
Distances between lines 70 at the region in which the lines are most 
closely spaced may be as close as 0.003 inches. The width of the lines may 
also be as small as 0.003 inches. 
Laminating the two cable panels together such that the pillars contact the 
associated conductive lines on the other cable panel avoids the problem of 
plated through holes that would be required if pillars were to be 
deposited directly through the insulating laminate material. The laminate 
insulating material may be a material providing electrical insulation such 
as polyimide, polyetherimide, an epoxy fiberglass composition or a 
polyetherimide fiberglass composition. 
A second conductor line 75 having a first end 77 and a second end 79 is 
embedded within the second side 52 of the laminate insulating material 50. 
The vertical connecting pillar 65 extends from the first end 77 of the 
second conductor line 75 through the opening 59 in the insulating material 
50 to a level approximately flush with that of the first side 51 of the 
insulating material 50. The other vertical connecting pillar 67 extends 
from the second end 79 of the second conductor line 75 through the opening 
60 in the insulating material 50 to a level also flush with the first side 
51 of the insulating material 50. Sets of vertical contact posts 80 and 85 
extend from vertical connecting pillar 65 and vertical connecting pillar 
67 respectively. 
Contact posts 90 and 95 extend from each of the first ends 71 of the first 
conductor line 70 and each of the second ends 72 of the conductor lines 70 
respectively. The insulating material 50 with the circuitry embedded 
therein is encompassed between a first electrical insulation sheet 100 and 
a second electrical insulation sheet 105 with the contact posts 80, 85, 90 
and 95 extending vertically therefrom. It is the two sets of contact posts 
80 and 90 which, when the cable 10 is inverted, align with the wafer 
connections 20 seen in FIG. 1 to provide electrical contact with the wafer 
30. 
FIG. 3 shows a cross section through the center of FIG. 2 and the item 
numbers correspond to those in FIG. 2. FIG. 3 is identical to FIG. 23 and 
is the result of a series of steps which will be described in FIG. 5 
through 23. 
FIG. 4 shows another embodiment of the elongated cable 10. This embodiment 
differs from that shown in FIG. 2 in that the second conductor line 75 in 
FIG. 2, rather than being of a singular planar solid configuration, is a 
plurality of individual second conductor lines 76. Just as in FIG. 2, 
these conductor lines are also embedded within the thin laminate 
insulating material 50. Furthermore, rather than singular vertical 
connecting pillars 65 and 67 of FIG. 2, a plurality of vertical connecting 
pillars 66 and 68 are located at opposite ends of the conductor lines 76. 
A plurality of first conductor lines 70 is still embedded in the 
insulating material 50 and contact posts 90 and 95 still extend vertically 
from each end of the first conductor lines 70. However, the contact posts 
80 and 85 now extend from individual vertical connecting pillars 66 and 68 
respectively. For simplicity fabrication of the cable in FIGS. 2 and 3 
will be described first and then the cable in FIG. 4 will be addressed. 
The fabrication of the cable 10 (FIG. 2) requires the bonding of a first 
cable panel to a second cable using an insulating lamination material 
disposed therebetween. FIGS. 5 through 8 show the initial steps for the 
fabrication of a first cable panel 200 as shown in FIG. 8. The fabrication 
of panel 200 begins with a temporary substrate 202 (FIG. 5) made of a 
material such as reusable type 304 stainless steel plate with a 2B finish. 
The plate 202 would typically be 0.075 inches thick and be mechanically 
and chemically cleaned. In a preferred embodiment, the first step in the 
manufacture of the first panel 200 is to deposit, by a process such as 
electroplating, a uniformly thin first base layer 204 of a conductive 
material such as copper on the substrate 202 so as to form a layer of 
approximately 0.0004 inches of copper over the entire substrate 202 as 
seen in FIG. 6. The copper layer 204 serves as a base layer upon which 
further deposition of conductor lines may be applied, and also serves as a 
releasing material for separating the lines from the stainless steel 
substrate 202 after formation of the panel 200 is complete. 
Note that in lieu of a substrate plated with a base layer of metal, a thin 
plate of metal such as copper may be used. If this were the case then 
rather than separating the base layer from any material deposited upon it, 
the entire plate may be mechanically or chemically removed. 
Also, in lieu of a substrate plated with a base layer of metal, it is 
possible to secure a thin layer of metal foil upon the substrate rather 
than electrolytically depositing a layer upon the substrate. The foil may 
be mechanically secured or chemically bonded to the substrate. To separate 
the foil, the foil would be mechanically released or the chemical bond 
dissolved or broken. 
Using a substrate 202 plated with a base layer 204 of metal, the base layer 
204 is then coated with a photosensitive resist layer, the resist layer is 
masked to a desired pattern and the resist layer is exposed to ultraviolet 
light thereby developing the exposed resist. The desired pattern is a 
pattern resembling the first conductor lines 70 and the vertical 
connecting pillars 65 and 67 shown in FIG. 2. The exposed resist is 
removed thereby exposing portions of the copper layer 204. The exposed 
portions of layer 204 are now used as a base for deposition of a first 
planar conductive pattern 215 upon the exposed portions of the first base 
layer 204 of conductive material as in FIG. 7. The first planar conductive 
pattern 215 which has been deposited upon the second base layer 204 
comprises the first conductor lines 70 and a portion 217 of vertical 
connecting pillar 65 (FIG. 2) and a portion 219 of vertical connecting 
pillar 67 (FIG. 2). A preferred technique for the deposition of the first 
planar conductive pattern 215 is through the electrolytical deposition 
process of electroplating. 
The use of photosensitive resist and selective exposure of the resist to 
define a pattern upon a conductive surface on which to deposit a metal are 
well known in the art and will not be discussed in detail. Note that the 
conductor lines are deposited in an additive manner and that no metal is 
etched or removed to form the conductor lines. This permits better 
dimensional stability of the conductor lines and also permits the 
fabrication of smaller lines than if subtractive processes were used. 
Once this deposition step has been completed, the vertical connecting 
pillar portions 217 and 219 of FIG. 7 must be further built up because it 
is these portions which make up pillars 56 and 67 in FIG. 2 and which must 
extend downward through the laminating insulating material (50 of FIG. 2) 
to electrically contact the circuitry of the second cable panel. Again a 
layer of photoresist is used but this time the resist covers the first 
planar conductive pattern 215, which includes the vertical connecting 
pillar portions 217 and 219, the circuit lines 70 and the exposed portions 
of the second base layer 204. The photoresist is masked such that only the 
portion of the photoresist above the vertical connecting pillar portions 
217 and 219 will be exposed. Second portions 227 and 229 may have smaller 
cross sections than portions 217 and 219 so that registration for 
deposition of the portions 227 and 229 over the portions 217 and 219 may 
be made easier. The photoresist is then selectively exposed and removed 
such that the ends of pillar portions 217 and 219 are exposed. A second 
planar conductive pattern 225 is now deposited, preferable through an 
electrolytical deposition process such as electroplating, so that second 
portions 227 and 229 are now deposited as in FIG. 8 to complete the 
vertical connecting pillars 65 and 67. Again the process of metal 
deposition is an additive one. This completes the fabrication of the first 
cable panel 200. 
The fabrication of a second cable panel 300 (FIG. 11) is illustrated in 
FIGS. 9 through 11. Note the use of the additive process for line 
deposition. The fabrication of this panel begins with a temporary 
substrate 302 (FIG. 9) made of a material such as reusable type 304 
stainless steel plate with a 2B finish. The plate 302 would typically be 
0.075 inches thick and be mechanically and chemically cleaned. The first 
step in the manufacture of the second panel 300 is to deposit, by an 
electrolytical process such as electroplating, a uniformly thin second 
base layer 304 of a conductive material such as copper on the substrate 
302 so as to form a layer of approximately 0.004 inches of copper over the 
entire substrate 302 (FIG. 10). The copper layer 304 serves as a base 
layer upon which further deposition of conductor lines may be applied, and 
also serves as a releasing material for separating the printed circuitry 
from the stainless steel substrate 302 after formation of the second cable 
panel 300 is complete. 
Note again that in lieu of a substrate plated with a base layer of metal, a 
thin plate of metal, such as copper, may be used. If this were the case 
then rather than separating the base layer from any material deposited 
upon it, the entire plate may be mechanically or chemically removed. Also, 
it is possible to secure a thin layer of metal foil upon the substrate 
rather than electrolytically depositing a layer upon the substrate. The 
foil may be mechanically secured or chemically bonded to the substrate. To 
separate the foil, the foil would be mechanically released or the chemical 
bond dissolved or broken. 
The base layer 304 which is deposited upon the substrate 304 is then coated 
with a photosensitive resist layer and masked with a photomask. The 
pattern of the photomask will resemble that of the second circuit line 75 
of FIG. 2. The photoresist is exposed to light and then developed so that 
select portions of the base layer 304 are exposed in a pattern similar to 
that of the circuitry to be deposited. A conductive metal is then 
deposited upon the exposed portions of the base layer 304 utilizing an 
electrolytical deposition process such as electroplating to form a third 
planar conductive pattern 306 upon the second base layer 304 as shown in 
FIG. 11. The third planar conductive pattern 306 comprises the second 
conductor line 75 as shown in FIG. 2. As previously mentioned, the 
deposition of photoresist, the masking, the exposure and the removal of 
photoresist at selected portions to permit deposition of metal upon 
certain areas of a base layer are well known in the art and will not be 
discussed in detail here. Furthermore, the deposition process is an 
additive one and as such no metal is etched or removed to form the 
conductor lines. This permits better dimensional stability of the 
conductor lines and also permits the fabrication of smaller lines than if 
subtractive processes were used. 
At this point the first cable panel 200 as shown in FIG. 8 and the second 
cable panel 300 as shown in FIG. 11 have been fabricated. Note in FIG. 8 
the vertical connecting pillars 65 and 67, which each are comprised of two 
portions 217, 219 and 219, 229 respectively, extend above the first planar 
conductive pattern 215 (FIG. 7). This is important because these pillars 
act as connecting members between the first cable panel 200 and the second 
cable panel 300. 
FIG. 12 shows the laminate insulating material 50 having a first side 51 
and a second side 52 and a first end 55 and a second end 57 along with 
openings 59 and 60 extending through the laminate insulating material 50. 
A preferred thickness of the insulating material is about 0.004 inches. 
The opening in the material 50 may be made by drilling holes through the 
material or other means. However it is only necessary to provide openings 
that act as clearance holes for the pillars and therefore the holes may be 
oversized. The amount of oversizing is related to the amount of material 
which flows during lamination. It is preferable for the material to be 
flexible so that the cable is flexible. To form the cable shown in FIG. 2 
it is necessary to laminate the first cable panel 200, using the laminate 
insulating material 50, to the second cable panel 300. 
As shown in FIG. 13, the first cable panel 200 is aligned with the laminate 
insulating material 50 such that the vertical connecting pillars 65 and 67 
are aligned with the holes 59 and 60 respectively through the material 50. 
Aligned with the first cable panel 200 is the second cable panel 300 such 
that the vertical connecting pillars 65 and 67 of the first cable panel 
are aligned with the first end 77 and the second end 79 respectively of 
the third planar conductive pattern 306. The third planar conductive 
pattern 306 is the circuit line 75 of FIG. 2. 
As shown in FIG. 14, this structure of panels 200 and 300 and laminate 
material 50 is laminated together to form a unitary structure 400. 
Preferably the lamination of the first cable panel 200, the second cable 
panel 300 and the insulating material 50 is performed using a 
thermocompression process. Using this process all three elements 200, 50 
and 300 are heated to a specified temperature and compressed to form the 
unitary structure 400. During this process, the first conductor lines 70 
are embedded within the first side 51 of the laminating material 50 and 
the second conductor line 75 is embedded within the second side 52 of the 
laminate material 50. Furthermore, under compression the material 50 
conforms to the first and second cable panels 200 and 300 such that the 
material around the holes 54 and 60 (FIG. 12) in the laminate material 
through which the vertical contact pillars 65 and 67 are inserted is 
compressed around these pillars and, aside from the pillar portion 
contacting the third planar conductor pattern 306, the pillars are fully 
enclosed by the insulating material 50. 
At this point, the contact posts 80, 85, 90 and 95 as shown in FIG. 2 must 
be added to the unitary structure 400 shown in FIG. 14. To do this 
portions of the first base layer 204 must be removed and the contact posts 
must be electrolytically deposited in the locations of the first end 71 
and second end 72 of the first conductor lines 70 and upon the vertical 
connecting pillars 65 and 67. 
For the electrolytical deposition process to be possible it is necessary 
for all of the surfaces receiving a deposition to be electrically 
connected such that a single terminal may contact the surfaces and provide 
the necessary electrical potential at these surfaces. For this reason only 
portions of the first base layer 204 are removed, thereby providing an 
electrical short across all of the these surfaces. Prior to this 
deposition the substrate 202 must be removed. 
For convenience, at the same time, substrate 302 should be removed although 
this step may be performed later. Since, in the preferred embodiment, the 
conductor lines were deposited upon a substrate of a different metal, the 
substrates 202 and 302 may be carefully peeled away from the respective 
conductive base layers 204 and 304 to expose the layers as shown in FIG. 
15. FIG. 15 illustrates a structure enclosed by the first base layer 204 
and the second base layer 304 with the first conductor lines 70, the 
vertical connecting pillars 65 and 67 and the second conductor line 75 
disposed therebetween. It is now necessary to deposit contact posts 80, 
85, 90 and 95 as shown in FIGS. 2 and 3 in their respective positions. 
Selected portions of the first base layer 204 must be removed so that the 
first ends 71 and the second ends 72 of the first conductor lines 70 are 
exposed and the ends of the vertical contact pillars 65 and 67 are 
exposed. Portions of the second base layer 204 must be removed to form 
cavities 400 and 405 (FIG. 16) to accomplish this result. 
As before a method by which photosensitive resist is deposited, selectively 
exposed to light and removed to form cavities within the resist may be 
used. The exposed surfaces within the cavities 400 and 405 are then 
subjected to an etchant for a specified time to remove the second base 
layer 204 at selected portions as seen in FIG. 16. FIG. 17 shows an 
isometric view of the configuration of FIG. 16. 
It is important to note that the entire first base layer 204 has not been 
removed. The contact posts 80, 85, 90 and 95 are to be electrolytically 
deposited upon the ends of the first conductor lines 70 and the vertical 
contact pillars 65 and 67 as shown in FIGS. 2 and 3. Preferably, these 
contact posts will be deposited through the process of electroplating. In 
order for electrolytical deposition to be successful, it is necessary for 
every location upon which electroplating will occur to be electrically 
interconnected. To this end, the first base layer 204 (FIG. 17) with 
openings 400, 405 electrically connects all of the first conductor lines 
71. Furthermore, the second base layer 304 is electrically connected to 
the vertical contact pillars 65 and 67. Because of this, a common clamp 
may be used to interconnect first base layer 204 with second base layer 
304 thereby permitting the entire structure shown in FIG. 16 and FIG. 17 
to be at the same electrical potential to permit electroplating. 
FIG. 18 is an isometric similar to that in FIG. 17 but is representative of 
the fabrication process for the cable shown in FIG. 4. The FIG. 18 details 
will be explained shortly. 
From FIGS. 16 and 17, in order to electrolytically deposit the contact 
posts 80, 85, 90 and 95, it is again necessary to utilize photoresist. A 
layer of photoresist is deposited within each opening 400 and 405 (FIGS. 
16 and 17) to cover the first conductor line ends 71 and 72 and the 
vertical contact pillar 65 and 67 ends. The photoresist is then masked, 
exposed and selectively removed such that only the area directly above the 
ends 71 and 72 of the first circuit lines 70 and the vertical connecting 
pillars 65 and 67 are exposed. Vertical contact posts 80, 85, 90 and 95 
may now be deposited as shown in FIG. 19. Note that individual contact 
posts 80 and 85 are deposited upon single pillars 65 and 67. These 
individual posts accommodate the connections available on the wafer (as 
shown in FIG. 1) or any other configuration that may be available. While 
what has been described is deposition of contact posts upon the pillars, 
it is possible to merely extend the pillars and use each pillar as an 
electrical connection point. It is possible to extend the length of the 
pair of pillars 65 and 67 such that the pillars extend to the level at 
which the contact posts 80 and 85 extend and have the pillars replace the 
posts entirely. 
At this point, the elongated cable 10 is essentially complete. However, the 
remainder of the first base layer 204 and the entire second base layer 304 
must be removed. While the removal of the second base layer 304 may be 
accomplished through a fairly straight forward techniques such as chemical 
etching, removal of the first base layer 204 is now complicated by the 
introduction of the newly deposited contact posts 80, 85, 90 and 95. For 
this reason as shown in FIG. 20, the openings 400 and 405 which were 
previously created in the first base layer 204 are now, along with the 
contact posts, covered with deposits 407 and 409 of a protective coating. 
With the coating in place, the remaining first base layer 204 is removed 
through a process such as etching as shown in FIG. 21. The remaining 
amounts 407 and 409 of the protective coating are then removed and the 
second base layer 304 is removed preferably through a method such as 
etching, thereby resulting in FIG. 22. It is also possible to remove base 
layer 304 at the same time as layer 204 is removed. 
At this point, however, the first conductor lines 70 and the second 
conductor lines 75 along with the contact posts 80, 85, 90 and 95 are 
entirely exposed. For this reason, two insulating cover layers 100 and 105 
are placed over the second conductor line 75 and the second surface 52 of 
the laminate and over the first conductor lines 70 and the first side of 
the laminate material 50 respectively. The contact posts 80, 85, 90 and 95 
extend into and through the surface of the insulating cover layer 105 
thereby providing contact points for external connections. Note that FIG. 
23 is identical to FIG. 3 and each of these is representative of the 
elongated cable 10 found in each of FIGS. 2 and 3. 
While the steps just described provide fabrication for the cable shown in 
FIG. 2, 3 and 17, another embodiment of the cable is shown in FIGS. 4 and 
18. The fabrication steps are similar as are the materials used. The line 
thickness and spacing is also the same. The differences between the two 
cables are seen in the second conductor line 75 in FIG. 2 and the second 
conductor lines 76 in FIG. 4. While the conductor line 75, as a singular 
plane, may be utilized as a ground plane or for a single signal, the 
conductor lines 76 may be used for many signals. 
However, with a plurality of second conductor lines 76, the pillars 65 and 
67 of FIG. 2 are no longer acceptable and individual connecting pillars 66 
and 67 must extend from each of the second conductor lines 76. Because of 
this the fabrication steps for the cable in FIG. 4 are slightly modified. 
As mentioned, a plurality of second conductor lines 76 is deposited and as 
such the photomask described with FIG. 11 will resemble that of the second 
conductor lines 76 pattern. Furthermore, since these are individual lines 
76, then there must be a pair of individual connecting pillars for each of 
the lines 76. For that reason the deposition described for FIG. 7 and FIG. 
8 must provide individual pillars as shown in FIG. 4 items 66 and 68. The 
photomask must be patterned so that when exposed to light and portions of 
the photoresist removed, the newly created cavities will provide a pattern 
onto which these individual pillars may be deposited. 
FIG. 18, which is similar to FIG. 17 except for the modifications discussed 
above, illustrates a cross-section isometric of the cable when fabricated 
with a plurality of connecting pillars 66 and 68. Aside from the 
differences discussed, the fabrication of the cable shown in FIG. 4 is 
similar to the fabrication of the cable shown in FIG. 2. 
The description of this invention is intended to be merely exemplary and 
not circumscriptive of the invention as it is claimed below. The 
invention, thus, may be modified by those skilled in the art and yet be 
within the scope of such claims.