EP1636844A2 - Strukturiertes halbleiterelement zur reduzierung von chargingeffekten - Google Patents
Strukturiertes halbleiterelement zur reduzierung von chargingeffektenInfo
- Publication number
- EP1636844A2 EP1636844A2 EP04741625A EP04741625A EP1636844A2 EP 1636844 A2 EP1636844 A2 EP 1636844A2 EP 04741625 A EP04741625 A EP 04741625A EP 04741625 A EP04741625 A EP 04741625A EP 1636844 A2 EP1636844 A2 EP 1636844A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- semiconductor circuit
- circuit element
- element according
- semiconductor
- pad
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W42/00—Arrangements for protection of devices
- H10W42/80—Arrangements for protection of devices protecting against overcurrent or overload, e.g. fuses or shunts
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P74/00—Testing or measuring during manufacture or treatment of wafers, substrates or devices
- H10P74/27—Structural arrangements therefor
- H10P74/277—Circuits for electrically characterising or monitoring manufacturing processes, e.g. circuits in tested chips or circuits in testing wafers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/90—Bond pads, in general
- H10W72/921—Structures or relative sizes of bond pads
- H10W72/923—Bond pads having multiple stacked layers
- H10W72/9232—Bond pads having multiple stacked layers with additional elements interposed between layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/90—Bond pads, in general
- H10W72/951—Materials of bond pads
- H10W72/952—Materials of bond pads comprising metals or metalloids, e.g. PbSn, Ag or Cu
Definitions
- the present invention relates to a semiconductor circuit element for reducing undesired charging effects, in particular a connection element of test structures for semiconductor circuits.
- Test structures are required for a technological process control for the measurement and evaluation of technological and electrical parameters at certain technological times.
- the DD 290 290 A5 is listed as an example. It describes how, in the manufacture of DRAM memory circuits, the quality of the gate oxides by measuring breakdown voltage strength and the quality of poly-Si or AI interconnects with regard to the frequency of interruptions or short-circuits as a random sample in the manufacturing process is to be checked. There it is also described that, by using special templates in the technological section of the conductor pattern structuring on one or more wafers instead of the circuits, test structures are to be produced which have been treated identically in all processing steps and therefore contain no further influencing variables.
- test structure for integrated circuits which is used for insulation control in integrated circuits, and in which electrically conductive connections between isolation areas and substrate doping and the electrical isolation between isolated isolation areas can be determined during and after completion of the wafer processing , In order to be able to access the test structures, they must be electrically connected to evaluation circuits. Connection elements are required for this. Such connection elements are known as so-called pads.
- pads of this type are significant antennas which can collect undesired charges during the manufacturing process, for example during plasma or implantation processes, and can transmit them to test structures. These charges can damage the gate oxide of transistor or gate oxide test structures.
- cases have become known in which the unwanted antenna effect of a pad has simulated a charging problem that is not relevant to the product. In order to still be able to use the test structure sensibly, the charge captured by the pad must be reduced.
- the present invention is based on the object of avoiding the disadvantages of conventional pads and of creating a semiconductor circuit element which reduces undesired charging effects and which, in particular in manufacturing processes, represents a connection element for test structures in which the area which acts as an antenna is reduced.
- the invention reduces the area of the semiconductor circuit element which acts as an antenna, as a result of which the charging is reduced and the test structure is again relevant to the product, so that it can be used again for the purposes for which it was designed.
- interconnect structures are etched into the pad. Just these interconnects are connected to the test structure - and not the unstructured rest - which means that depending on the structure of the pad, the antenna ratio decreases by a factor of about 100 and the damaging effect is reduced accordingly.
- the surface of the semiconductor circuit element has interconnect structures that are electrically insulated from the remaining surface of the semiconductor circuit element, and that only the interconnect structures are connected to downstream semiconductor circuit elements.
- the permissible area free of interconnect structures can be designed on the surface of the semiconductor circuit element such that it is not larger than the expected minimum contact area of a contact needle when the semiconductor circuit element is contacted.
- the semiconductor circuit element can be used particularly advantageously as a connection pad for test structures, but it can also be designed as a protective structure for charge-sensitive layers.
- the surface of the semiconductor circuit element is metallic, it being particularly advantageous if the metallic surface of the semiconductor circuit element is formed by an aluminum layer.
- the semiconductor circuit element can be produced particularly easily if it is structured by etching, the etching structure of the semiconductor circuit element being formed by trenches whose trench width is a fraction of the width of the interconnect and a single or multiple of a minimum permissible metal-metal distance.
- the trenches between conductive path structures electrically connected to downstream semiconductor circuit elements and surface areas of the semiconductor circuit element not electrically connected to downstream semiconductor circuit elements are bridged when contacting the surface of the semiconductor circuit element with contact needles.
- contact needles When the surface of the semiconductor circuit element comes into contact with contact needles, a short circuit between the connected and the non-connected surface areas occurs after the contact pins have been put on, but this is not harmful but is welcome because it reduces the contact resistance.
- the adjustment effort increases, which can be accepted if the premise is to reduce the antenna ratio.
- Figure 1 shows a structure according to the invention, highly schematic and enlarged
- FIG. 2 shows a particularly simple variant of the invention
- FIG. 3 shows a cross section through a structure according to FIGS
- Figure 4 shows a cross section through a structure according to the prior art.
- FIG. 1 A structure shown in a highly schematic and enlarged manner in FIG. 1 represents a semiconductor circuit element in the form of a connection pad 1 for a test structure outer contour line 2 represents the pad outline of a connection pad 1, which also corresponds to the pad outline of a conventional connection pad, which in reality has a size of approx. 50 x 70 ⁇ m 2 , for example.
- This area of approx. 50 x 70 ⁇ m 2 represents - insofar as it is unstructured according to the prior art - a significant antenna area for a downstream semiconductor circuit if - as is customary in the prior art - it is connected to the downstream semiconductor circuit.
- connection pad 1 In order to be able to use test structures sensibly, the charge captured by connection pad 1 must be reduced, to which the invention contributes by structuring the surface of the pad.
- the reference number 3 designates interconnects which are etched into the surface 4. An etching process creates trenches 6 between the interconnects 3 and the unstructured remainder 5 of the surface 4 of the connection pad 1. These trenches 6 electrically separate the interconnects 3 from the metallic residual surface 5 of the connection pad 1.
- the trenches 6 are illustrated by the lines that run parallel to the outlines of the interconnects 3.
- the drawing is not to scale in all the figures and is also not proportional to the other figures.
- Conductors 3 are surrounded all around by an associated trench 6, which completely electrically separates the interconnect 3 from the non-structured residual surface 5.
- the width of the interconnects 3 is selected such that it corresponds to the usual width of feed lines between a pad 1 and a line to be connected
- Test structure corresponds, this is for example approx. 1.5 ⁇ m.
- design rules for the Fixed semiconductor switching elements are specified in so-called design rules for the Fixed semiconductor switching elements, but the invention is not limited to such a structured structuring; accordingly, it can also have other dimensions.
- the selected width of the trenches 6 is intended to ensure a quick and complete separation of the interconnect 3 from the pad 1 during the etching.
- the width of the trenches 6 should not be much larger than a few micrometers ( ⁇ m) in order to support short-circuiting by smeared aluminum on the surface 4 or 5 when a contact needle 9 is placed on it, the material of the surface naturally also being different than aluminum can be.
- connection pad 1 The essence of the invention - as already mentioned several times - is to reduce the active antenna area of a connection pad 1. This is done by structuring the surface of the pad 1 with the aid of the interconnects 3, which are etched from the rest of the surface by trenches 6 Pads are separated. Only these interconnects 3 are electrically connected to the semiconductor circuit elements 8 arranged downstream of them. For this purpose, it must be ensured in the contact plane 7 below the metal level of the pad 1 (see FIG. 3) that only the interconnects 3 are electrically connected to the semiconductor circuit elements 8 arranged downstream. The remaining surface 5 must not be electrically connected to the downstream semiconductor switching elements 8.
- FIG. 4 which represents the state of the art, shows a likewise highly schematic cross section through a semiconductor component.
- a certain problem with the pads 1 structured according to the invention is the contacting of the pad 1 with contact needles 9, which serve to electrically connect the pad 1 to the external evaluation circuit.
- a conventional contact needle 9 has a contact area of approximately 10 ⁇ m in diameter.
- the contact needle is easily placed anywhere on the surface 5 4 of the pad 1 4 and the electrical contact to the pad 1 4 and the downstream semiconductor circuit element 8.1 is established.
- the contact needle 9 would accordingly have to be placed exactly on an interconnect 3.
- the surface 4 of the pad 1 is structured in such a way that no surface area larger than that can form on the structured surface 4 of the pad 1 Diameter of approximately 10 ⁇ m of the contact needle 9.
- a further advantageous effect with the pad 1 according to the invention is that the regions of the surface 5 of the pad 1 that are not electrically connected to the downstream semiconductor circuit elements 8 can also be used for better contacting.
- the contact needle 9 placed on the surface 4/5 of the pad 1 short-circuits the hit interconnect 3 and the likewise covered areas of the non-connected surface 5 of the pad 1.
- the short circuit after the contact needle 9 has been put on reduces the contact resistance, but is not harmful with regard to undesired charging, because the part 5 of the surface of the pad 1 which is not connected is then no longer effective as an antenna.
- the exemplary embodiment according to FIG. 2 shows that in principle one interconnect 3 is sufficient to implement the invention with advantage. Since, in practice, a contact needle 9 is placed rather centrally, a corresponding interconnect 3 in the center of the surface 4 of the pad 1 can also be contacted with the corresponding adjustment effort. Since the contact is not made punctually, but rather in a sliding manner on a track-like area, non-connected areas in the vicinity of the conductor track 3 are short-circuited when contacting the contact area of the contact needle 9 and contribute to reducing the contact resistance. Although there is a large surface area of the pad 1, the active antenna area of the pad 1 can be considerably reduced with this measure, so that the charge captured by the pad 1 is reduced by a factor of approximately 100.
- connection pads of test structures but is also suitable as a protective structure for charging-sensitive semiconductor components.
- the pad structured according to the invention represents a semiconductor circuit element which has a small capacitance until it is actually contacted.
- Such a semiconductor circuit element can also be structured in the “second” level, i.e. in the downstream semiconductor circuit level according to FIG. 3.
Landscapes
- Semiconductor Integrated Circuits (AREA)
- Testing Or Measuring Of Semiconductors Or The Like (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10328007A DE10328007A1 (de) | 2003-06-21 | 2003-06-21 | Strukturiertes Halbleiterelement zur Reduzierung von Chargingeffekten |
| PCT/EP2004/050884 WO2004114406A2 (de) | 2003-06-21 | 2004-05-21 | Strukturiertes halbleiterelement zur reduzierung von chargingeffekten |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1636844A2 true EP1636844A2 (de) | 2006-03-22 |
Family
ID=33520777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04741625A Ceased EP1636844A2 (de) | 2003-06-21 | 2004-05-21 | Strukturiertes halbleiterelement zur reduzierung von chargingeffekten |
Country Status (4)
| Country | Link |
|---|---|
| US (2) | US7646104B2 (de) |
| EP (1) | EP1636844A2 (de) |
| DE (1) | DE10328007A1 (de) |
| WO (1) | WO2004114406A2 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2535707A (en) * | 2015-02-24 | 2016-08-31 | Fives Landis Ltd | Machine tools and methods of operation thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020079584A1 (en) * | 2000-12-27 | 2002-06-27 | Noriaki Matsunaga | Semiconductor device with a split pad electrode |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD261672A1 (de) * | 1987-06-02 | 1988-11-02 | Halbleiterwerk Veb | Teststruktur zur isolationskontrolle in integrierten schaltungen |
| US5053850A (en) * | 1988-03-14 | 1991-10-01 | Motorola, Inc. | Bonding pad for semiconductor devices |
| DD290290A5 (de) * | 1989-12-11 | 1991-05-23 | Veb Mikroelektronik "Karl Marx" Erfurt,De | Teststruktur fuer technologische prozesssteuerung |
| JPH05235085A (ja) * | 1992-02-26 | 1993-09-10 | Nec Corp | 半導体装置 |
| US6306749B1 (en) * | 1999-06-08 | 2001-10-23 | Winbond Electronics Corp | Bond pad with pad edge strengthening structure |
| US6551916B2 (en) * | 1999-06-08 | 2003-04-22 | Winbond Electronics Corp. | Bond-pad with pad edge strengthening structure |
| US6337502B1 (en) * | 1999-06-18 | 2002-01-08 | Saifun Semicinductors Ltd. | Method and circuit for minimizing the charging effect during manufacture of semiconductor devices |
| US6844631B2 (en) * | 2002-03-13 | 2005-01-18 | Freescale Semiconductor, Inc. | Semiconductor device having a bond pad and method therefor |
| DE10213609B4 (de) * | 2002-03-27 | 2006-02-09 | Infineon Technologies Ag | Elektrisches Bauelement mit einer Kontaktierungsfläche und Verfahren zum Ausbilden einer Kontaktierungsfläche auf einem Halbleitermaterial |
-
2003
- 2003-06-21 DE DE10328007A patent/DE10328007A1/de not_active Ceased
-
2004
- 2004-05-21 WO PCT/EP2004/050884 patent/WO2004114406A2/de not_active Ceased
- 2004-05-21 EP EP04741625A patent/EP1636844A2/de not_active Ceased
-
2005
- 2005-12-20 US US11/314,538 patent/US7646104B2/en not_active Expired - Fee Related
-
2009
- 2009-10-07 US US12/575,275 patent/US20100019398A1/en not_active Abandoned
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020079584A1 (en) * | 2000-12-27 | 2002-06-27 | Noriaki Matsunaga | Semiconductor device with a split pad electrode |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2004114406A2 (de) | 2004-12-29 |
| US20100019398A1 (en) | 2010-01-28 |
| US20060097253A1 (en) | 2006-05-11 |
| US7646104B2 (en) | 2010-01-12 |
| WO2004114406A3 (de) | 2005-04-28 |
| DE10328007A1 (de) | 2005-01-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20051121 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE FR GB |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: VOLLERTSEN, ROLF-PETER |
|
| DAX | Request for extension of the european patent (deleted) | ||
| RBV | Designated contracting states (corrected) |
Designated state(s): DE FR GB |
|
| 17Q | First examination report despatched |
Effective date: 20090721 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: INFINEON TECHNOLOGIES AG |
|
| R17C | First examination report despatched (corrected) |
Effective date: 20090721 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R003 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
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| 18R | Application refused |
Effective date: 20131216 |